Entries |
Document | Title | Date |
20080199390 | Enhanced Directional Conductivity Of Graphitizable Foam - A graphitizable carbon foam having enhanced directional thermal conductivity is provided. The mesophase portions of a mesophase pitch are aligned with each other to create an oriented mesophase pitch, which is then foamed to provide an oriented pitch foam. The pitch foam can be heated to carbonize the pitch thereby forming an oriented carbon foam. The carbon foam can be further heated to provide an oriented graphite foam. | 08-21-2008 |
20080279756 | Method of producing exfoliated graphite, flexible graphite, and nano-scaled graphene platelets - The present invention provides a method of exfoliating a layered material (e.g., graphite and graphite oxide) to produce nano-scaled platelets having a thickness smaller than 100 nm, typically smaller than 10 nm. The method comprises (a) dispersing particles of graphite, graphite oxide, or a non-graphite laminar compound in a liquid medium containing therein a surfactant or dispersing agent to obtain a stable suspension or slurry; and (b) exposing the suspension or slurry to ultrasonic waves at an energy level for a sufficient length of time to produce separated nano-scaled platelets. The nano-scaled platelets are candidate reinforcement fillers for polymer nanocomposites. Nano-scaled graphene platelets are much lower-cost alternatives to carbon nano-tubes or carbon nano-fibers. | 11-13-2008 |
20080286191 | Process For The Production Of Highly Graphitizable Carbon Foam - A highly graphitizable carbon foam useful for, inter alia, battery components or high temperature applications, which includes a carbon foam produced from conventional mesophase pitch and a cross-linking agent like sulfur. | 11-20-2008 |
20090028777 | Environmentally benign chemical oxidation method of producing graphite intercalation compound, exfoliated graphite, and nano-scaled graphene platelets - A method of producing exfoliated graphite, flexible graphite, or nano-scaled graphene platelets. The method comprises: (a) forming a graphite intercalation compound by a chemical oxidation reaction which uses a combination of a carboxylic acid and hydrogen peroxide as an intercalate source; and (b) rapidly heating the graphite intercalation compound to a desired temperature for a length of time sufficient for producing exfoliated graphite. The method may further comprise a step of subjecting the exfoliated graphite to a mechanical shearing treatment to produce nano-scaled graphene platelets. Alternatively, the method may further comprise a step of compressing the exfoliated graphite to form a flexible graphite product. The exfoliation step in the instant invention does not involve the evolution of undesirable species, such as NO | 01-29-2009 |
20090028778 | Environmentally benign graphite intercalation compound composition for exfoliated graphite, flexible graphite, and nano-scaled graphene platelets - A carboxylic-intercalated graphite compound composition for the production of exfoliated graphite, flexible graphite, or nano-scaled graphene platelets. The composition comprises a layered graphite with interlayer spaces or interstices and a carboxylic acid residing in at least one of the interstices, wherein the composition is prepared by a chemical oxidation reaction which uses a combination of a carboxylic acid and hydrogen peroxide as an intercalate source. Alternatively, the composition may be prepared by an electrochemical reaction, which uses a carboxylic acid as both an electrolyte and an intercalate source. Exfoliation of the invented composition does not release undesirable chemical contaminants into air or drainage. | 01-29-2009 |
20090041653 | Method for the preparation of porous graphite carbon with high crystallinity using sucrose as a carbon precursor - The present invention relates to a process for preparing a porous graphite carbon with high crystallinity, which comprises the steps of: (a) hydrothermally treating sucrose (i.e. carbon precursor), transitional metal precursor and uniform-sized silica particles at the same time to prepare a polymer; and (b) carbonizing the polymer, which can provide a porous graphite carbon with remarkably improved crystallinity suitable for a catalyst support for a fuel cell. | 02-12-2009 |
20090087373 | Method and Apparatus for Producing a Carbon Based Foam Article Having a Desired Thermal-Conductivity Gradient - A carbon based foam article is made by heating the surface of a carbon foam block to a temperature above its graphitizing temperature, which is the temperature sufficient to graphitize the carbon foam. In one embodiment, the surface is heated with infrared pulses until heat is transferred from the surface into the core of the foam article such that the graphitizing temperature penetrates into the core to a desired depth below the surface. The graphitizing temperature is maintained for a time sufficient to substantially entirely graphitize the portion of the foam article from the surface to the desired depth below the surface. Thus, the foam article is an integral monolithic material that has a desired conductivity gradient with a relatively high thermal conductivity in the portion of the core that was graphitized and a relatively low thermal conductivity in the remaining portion of the foam article. | 04-02-2009 |
20090092537 | PROCESS FOR OBTAINING PELLETIZED GRAPHITE - A process for obtaining pelletized graphite from graphite is disclosed. The process obtains pelletized graphite or natural graphite in any form, including pellets, flakes and grains from graphite, dry based graphite or wet based graphite. | 04-09-2009 |
20090155161 | METHOD OF PREPARING GRAPHENE SHELL AND GRAPHENE SHELL PREPARED USING THE METHOD - Provided are a method of preparing a graphene shell and a graphene shell prepared using the method. A first heat treatment is performed on a mixture of an organic solvent and a graphitization catalyst so as to carburize the graphitization catalyst with carbon decomposed from the organic solvent. The graphitization catalyst is in the form of particles. A second heat treatment process is performed on the carburized graphitization catalyst in an inert or reductive gas atmosphere to thereby form graphene shells on surfaces of the carburized graphitization catalyst | 06-18-2009 |
20090169467 | Production of ultra-thin nano-scaled graphene platelets from meso-carbon micro-beads - A method of producing nano-scaled graphene platelets (NGPs) having an average thickness no greater than 50 nm, typically less than 2 nm, and, in many cases, no greater than 1 nm. The method comprises (a) intercalating a supply of meso-carbon microbeads (MCMBs) to produce intercalated MCMBs; and (b) exfoliating the intercalated MCMBs at a temperature and a pressure for a sufficient period of time to produce the desired NGPs. Optionally, the exfoliated product may be subjected to a mechanical shearing treatment, such as air milling, air jet milling, ball milling, pressurized fluid milling, rotating-blade grinding, or ultrasonicating. The NGPs are excellent reinforcement fillers for a range of matrix materials to produce nanocomposites. Nano-scaled graphene platelets are much lower-cost alternatives to carbon nano-tubes or carbon nano-fibers. | 07-02-2009 |
20090196816 | Carbon powder suitable as a negative electrode material for nonaqueous secondary batteries - Carbon powder having low temperature calcined carbon derived from pitch adhered to a portion of the surface of natural graphite powder is obtained by solids mixing of natural graphite powder and pitch powder as a carbon precursor followed by heat treatment at 900-1500° C. to carbonize the pitch. The amount of pitch powder is such that the ratio V | 08-06-2009 |
20090285747 | MICRO-DOMAIN GRAPHITIC MATERIALS AND METHOD FOR PRODUCING SAME - This invention relates to a method for producing micro-domain graphitic materials by use of a plasma process, and to novel micro-conical graphitic materials. By micro-domain graphitic material we mean fullerenes, carbon nanotubes, open conical carbon structures (also named micro-cones), preferably flat graphitic sheets, or a mixture of two or all of these. The novel carbon material is open carbon micro-cones with total disclination degrees of 60° and/or 120°, corresponding to cone angles of respectively 112.9° and/or 83.6°. | 11-19-2009 |
20090324485 | HIGH PURITY NUCLEAR GRAPHITE - A highly isotropic graphite useful for, inter alia, nuclear applications is disclosed, which has a ash content of less than 300 ppm and a boron equivalence of less than about 2 ppm without requiring a post graphitization purification step. | 12-31-2009 |
20100055025 | Process for producing dispersible Nano Graphene Platelets from oxidized graphite - The present invention provides a process for producing nano graphene platelets (NGPs) that are dispersible and conducting. The process comprises: (a) preparing a graphite intercalation compound (GIC) or graphite oxide (GO) from a laminar graphite material; (b) exposing the GIC or GO to a first temperature for a first period of time to obtain exfoliated graphite; and (c) exposing the exfoliated graphite to a second temperature in a protective atmosphere for a second period of time to obtain the desired dispersible nano graphene platelet with an oxygen content no greater than 25% by weight, preferably below 20% by weight, further preferably between 5% and 20% by weight. Conductive NGPs can find applications in transparent electrodes for solar cells or flat panel displays, additives for battery and supercapacitor electrodes, conductive nanocomposite for electromagnetic wave interference (EMI) shielding and static charge dissipation, etc. | 03-04-2010 |
20100074835 | Production of Nano-Structures - A process for the production of nano-structures is presented, involving providing a graphite flake comprising graphene layers; intercalating the graphite flake to form a graphite intercalation compound exhibiting Stage I, II or III intercalation; and exfoliating the graphite intercalation compound under conditions such that a plurality of individual graphene layers are separated from the graphite intercalation compound. | 03-25-2010 |
20100092370 | PREPARATION OF A CARBON NANOMATERIAL USING A REVERSE MICROEMULSION - Powdered, amorphous carbon nanomaterials are formed from a carbon precursor in reverse microemulsion that includes organic solvent, surfactant and water. Methods for manufacturing amorphous, powdered carbon nanomaterials generally include steps of (1) forming a reverse microemulsion including at least one non-polar solvent, at least one surfactant, and at least one polar solvent, (2) adding at least one carbon precursor substance to the reverse microemulsion, (3) reacting the at least one carbon precursor substance so as to form an intermediate carbon nanomaterial, (4) separating the intermediate amorphous carbon nanomaterial from the reverse microemulsion, and (5) heating the intermediate amorphous carbon nanomaterial for a period of time so as to yield an amorphous, powdered carbon nanomaterial. Amorphous, powdered carbon nanomaterials manufactured according to the present disclosure typically have a surface area of at least 500 m | 04-15-2010 |
20100135893 | CARBON NANORINGS MANUFACTURED FROM TEMPLATING NANOPARTICLES - Methods for manufacturing carbon nanostructures include 1) forming intermediate carbon nanostructures by polymerizing a carbon precursor in the presence of templating nanoparticles, 2) carbonizing the intermediate carbon nanostructures to form an intermediate composite nanostructure, and 3) removing the templating nanoparticles from the intermediate composite nanostructure to form carbon nanorings. The carbon nanorings manufactured using the foregoing steps have one or more carbon layers forming a wall that defines a generally annular nanostructure having a hole. The length of the nanoring is less than or about equal to the outer diameter thereof. The carbon nanostructures are well-suited for use as a fuel cell catalyst support. The carbon nanostructures exhibit high surface area, high porosity, high graphitization, and facilitate mass transfer and electron transfer in fuel cell reactions. Carbon nanorings manufactured according to the present invention can be used as a substitute for more expensive and likely more fragile carbon nanotubes. | 06-03-2010 |
20100209330 | Graphite Layers - The present invention relates to a method for preparing graphite layers, comprising the step of heating at least one monolayer with low-molecular weight aromatics and/or low-molecular weight heteroaromatics crosslinked in the lateral direction under vacuum or inert gas to a temperature of >800 K, and to graphite layers which are obtainable by this method. | 08-19-2010 |
20100209331 | ARTIFICIAL GRAPHITE FOR NEGATIVE ELECTRODE OF LITHIUM ION SECONDARY BATTERY, AND METHOD FOR PRODUCTION THEREOF - The artificial graphite for the negative electrode of a lithium ion secondary battery according to the invention has a crystallite size Lc of 60-120 nm in the c-axial direction according to X-ray diffraction, and a crystallite size Lc of 150 nm or greater when subjected to graphitizing at a temperature of 3000° C. in an inert gas atmosphere. | 08-19-2010 |
20100266479 | RAW MATERIAL CHARCOAL COMPOSITION FOR NEGATIVE ELECTRODE MATERIAL OF LITHIUM ION SECONDARY BATTERY AND METHOD FOR PRODUCING THE SAME - In the raw coke composition of the invention, as the starting material for a negative electrode material of a lithium ion secondary battery, the ratio of the crystallite size Lc(002) and lattice constant co(002) (Lc(002)/co(002)) on the 002 face is no greater than 180, and the ratio of the crystallite size La(110) and the lattice constant ao(110) (La(110)/ao(110)) on the 110 face is no greater than 1500, as determined by X-ray diffraction upon graphitizing in an inert gas atmosphere at a temperature of 2800° C. | 10-21-2010 |
20100272628 | Fabrication of Plate-Like Natural Crystalline Graphite with Nano-Scale Thickness - Provided is a method for preparing plate-like ultrafine particles of flaky graphite having an average graphite plate diameter of 3-5 μm and a graphite plate thickness of 20-60 nm, including: grinding natural flaky graphite to control the particle size to 5-15 μm; dipping the ground flaky graphite into an aqueous solution containing an acid and an oxidizing agent, followed by washing and drying, to form a graphite intercalation compound in the ground flaky graphite; carrying out gasification of the graphite intercalation compound via low-temperature heat treatment to expand the flaky graphite to 20-30%; and carrying out wet grinding of the expanded flaky graphite at a slurry concentration of 20-28 wt %. | 10-28-2010 |
20100310447 | CARBON-CONTAINING MATRIX WITH FUNCTIONALIZED PORES - A composition of matter comprises a carbon-containing matrix. The carbon-containing matrix may comprise one or more carbon materials selected from the group comprising graphite crystalline carbon materials, carbon powder, carbon fibers, artificial graphite powder, and combinations thereof. In addition, the carbon-containing matrix comprises a plurality of pores. The composition of matter also comprises a reactive additive that is not a metal pressure disposed within at least a portion of the plurality of pores. | 12-09-2010 |
20110044881 | Method For The Catalytic Extraction Of Coal - A method for the production of a carbon material from the extraction of coal, comprising forming a mixture of coal, a solvent and a catalyst selected from the group consisting of molybdenum, tin, titanium, zirconium, hafnium, thorium, selenium, tellurium, polonium, iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium, platinum, the catalytically-active compounds and coordination compounds containing any of the foregoing, and combinations and mixtures thereof. | 02-24-2011 |
20110070146 | METHOD OF MANUFACTURING GRAPHENE, GRAPHENE MANUFACTURED BY THE METHOD, CONDUCTIVE FILM COMPRISING THE GRAPHENE, TRANSPARENT ELECTRODE COMPRISING THE GRAPHENE, AND RADIATING OR HEATING DEVICE COMPRISING THE GRAPHENE - Provided are a method of manufacturing graphene, graphene manufactured by the method, a conductive thin film including the graphene, a transparent electrode comprising the graphene, and a radiating or heating device comprising the graphene. The method includes: preparing a graphene member including a base member, a hydrophilic oxide layer formed on the base member, a hydrophobic metal catalyst layer formed on the oxide layer, and graphene grown on the metal catalyst layer; applying water to the graphene member; separating the metal catalyst layer from the oxide layer; and removing the metal catalyst layer using an etching process. | 03-24-2011 |
20110085962 | SYSTEM AND METHOD FOR MAKING LOW VOLATILE CARBONACEOUS MATTER WITH SUPERCRITICAL CO2 - A system for making low volatile carbonaceous material including a digestion vessel in communication with a carbonaceous material feedstock unit for producing a digested carbonaceous material; an extraction vessel in communication with the digestion vessel, the extraction vessel containing supercritical carbon dioxide fluid for extracting hydrocarbons from the digested carbonaceous material to produce an extract solvent and the low volatile carbonaceous material; and at least one separation vessel in communication with the extraction vessel for separating the extract solvent to a carbon dioxide gas and a stream of extracted hydrocarbons. | 04-14-2011 |
20110097258 | METHOD FOR PREPARING GRAPHENE RIBBONS WHERE STRUCTURE IS CONTROLLED - Disclosed is a method for fabricating graphene ribbons which are high-functional carbon materials. Provided a method of fabricating graphene ribbons, including (a) preparing a carbon structure in which a graphene ribbon is spirally grown (a graphene helix), revealing a tube shape, and (b) applying energy to unroll the graphene helix into the graphene ribbons. | 04-28-2011 |
20110189077 | MICROPOROUS GRAPHITE FOAM AND PROCESS FOR PRODUCING SAME - A microporous graphite foam, comprising a matrix of graphite fibers joined by a graphitized graphite-forming precursor, wherein the foam comprises irregular interstitial spaces having an average pore size in the range from about 0.1 to about 10 microns and a void fraction in the range from about 80% to about 95%. A process for producing a microporous graphite foam including a matrix of graphite fibers joined by a graphitized graphite-forming precursor. In its various embodiments, the graphite foam has one or more of pore sizes less than about ten microns, low bulk density, high physical strength and good machinability, while also having the desirable characteristics of graphite, including high thermal conductivity, electrical conductivity and solderability. A cryogenic cooling system including the graphite foam. In one embodiment, the graphite foam is a component of a cooling interface in the cryogenic cooling system. | 08-04-2011 |
20110223095 | CARBON NANOTUBE FILM - An apparatus includes a substrate and a carbon nanotube film on the substrate. The carbon nanotube film includes microscopically visible overlapping dots of carbon nanotubes. The overlapping dots being microscopically visible signifies that the carbon nanotube film was formed by depositing a solution of the carbon nanotubes on the substrate in a single pass manner. | 09-15-2011 |
20110243832 | PROCESS FOR THE PRODUCTION AND TREATMENT OF GRAPHITE POWDERS - The disclosure relates to processes for the production and thermal treatment of carbon material, in particular, graphite powders, in an Acheson type oven, using a functional filler comprising graphitic material in particulate form allowing electrical current to flow through the charge. The particulate form of the filler allows greater flexibility and can be used to control the degree of direct and indirect heating, resulting in more uniform products. Such graphite materials may typically be employed as an additive in polymers, batteries, or other applications. | 10-06-2011 |
20110268647 | PRODUCING TWO-DIMENSIONAL SANDWICH NANOMATERIALS BASED ON GRAPHENE - Two-dimensional nanomaterials are produced in a process comprising the steps of
| 11-03-2011 |
20110300058 | METHOD OF GRAPHENE MANUFACTURING - The present invention relates to a method for manufacturing graphene by vapour phase epitaxy on a substrate comprising a surface of SiC, characterized in that the process of sublimation of silicon from the substrate is controlled by a flow of an inert gas or a gas other than an inert gas through the epitaxial reactor. The invention also relates to graphene obtained by this method. | 12-08-2011 |
20110311431 | CRYSTALLINE CARBONACEOUS MATERIAL WITH CONTROLLED INTERLAYER SPACING AND METHOD OF PREPARING SAME - A crystalline carbon material with controlled interlayer spacing and a method of manufacturing the crystalline carbon material are disclosed. The crystalline carbon material has peaks of a (002) plane at 2θ=23°±5.0° and 2θ=26.5°±1.0° when X-ray diffraction is measured using a CuKα ray. The peak height at 2θ=23°±5.0° is higher than the one at 2θ=26.5°±1.0°. | 12-22-2011 |
20110318257 | PRODUCTION OF GRAPHENE SHEETS AND FEATURES VIA LASER PROCESSING OF GRAPHITE OXIDE/ GRAPHENE OXIDE - Graphene production using a continuous or pulsed laser beam focused on a substrate of graphite oxide in a significantly inert environment is disclosed. Laser-induced graphene features are characterized by a 2D-band in the Raman spectra. When the photons of the laser at a various frequencies and power levels beam impinge a graphite oxide foil for various amounts of time, a strip, divet, trench, or hole, having graphene at the bottom or sides is produced. The concentration of the graphite oxide and the laser beam may be adjusted so that the depth of the trench created is a certain depth less than the thickness of the foil. Additionally, in some embodiments, the evaporation of the water during the Hummers method is adjusted so that there remains interlaminar water in the graphite oxide foil. The presently disclosed subject matter may also be used in patterning using rastering or substrate motion. | 12-29-2011 |
20120014862 | GRAPHITE MATERIAL - A graphite material includes a plurality of graphite particles and a plurality of pores. The plurality of graphite particles and the plurality of pores form a microstructure. A ratio of an elastic modulus to a compression strength of the graphite material ranges from 109 to 138. Preferably, a ratio of a total area of the pores to a whole area of the graphite material in a cross-section of the graphite material ranges from 17.94% to 19.97%. | 01-19-2012 |
20120034151 | Filmy Graphite and Process for Producing the Same - A process for producing a filmy graphite includes the steps of forming a polyimide film having a birefringence of 0.12 or more and heat-treating the polyimide film at 2,400° C. or higher. | 02-09-2012 |
20120107222 | EXPANDED GRAPHITE SHEET - An object is to provide an expanded graphite sheet at the use stage that can prevent can prevent degradation in product quality and deterioration in product yield by inhibiting the expanded graphite sheet from containing impurities even when the expanded graphite sheet is actually used. | 05-03-2012 |
20120114551 | PRODUCTION OF GRAPHENE FROM METAL ALKOXIDE - A process for producing grapheme is disclosed. The process comprises introducing a solution ( | 05-10-2012 |
20120171108 | METHOD FOR FABRICATING GRAPHENE SHEETS OR GRAPHENE PARTICLES USING SUPERCRITICAL FLUID - A method for fabricating graphene sheets or graphene particles includes (a) dispersing graphene oxide in an alcohol solution to prepare a graphene oxide dispersion solution, (b) reducing the graphene oxide dispersion solution under a supercritical condition to prepare graphene sheets or graphene particles, each of which is as a cluster of the graphene sheets, and (c) separating the graphene sheets or graphene particles, followed by washing and drying, and a method for fabricating a graphene film is configured to fabricate a graphene film in form of a thin film using the graphene sheets or graphene particles fabricated according to the method. | 07-05-2012 |
20120171109 | RANDOM GRAPHITE AND FABRICATION METHOD THEREOF USING GRAPHENE NANORIBBON - Random graphite which is a type of graphite comprising three-dimensionally random graphene layers, and a fabrication method thereof at a low temperature as below 100° C. are disclosed. Random graphite may have a large volume of an empty space due to the feature of the presence of the three-dimensionally random graphene nanoribbons. Thus, it can be applied to Graphitic Intercalation Compound (GIC) such as electrodes for Li-ion battery. | 07-05-2012 |
20120177562 | PROCESS FOR PRODUCING A CARBONACEOUS PRODUCT FROM BIOMASS - A process for producing densified and at least partially graphitised carbonaceous product. The process includes the following steps: heating a biomass in an oxygen controlled atmosphere to a first temperature under compression to form a plastically deformed intermediate product and heating the plastically deformed intermediate product in an oxygen controlled atmosphere to a second temperature that is higher than the first temperature, while constraining the intermediate product to limit or avoid volume expansion to form the densified and at least partially graphitised carbonaceous product. | 07-12-2012 |
20120195821 | METHOD FOR FORMING GRAPHENE NANORIBBONS - A method for forming graphene nanoribbons includes: (a) dispersing carbon nanotubes in a solvent to obtain a nanotube-dispersing solution; (b) adding an oxidant into the nanotube-dispersing solution to obtain a reaction solution; and (c) microwave heating the reaction solution and longitudinally unzipping the carbon nanotubes to form graphene nanoribbons. | 08-02-2012 |
20120237437 | CARBON MATERIAL AND METHOD OF MANUFACTURING THE SAME - A carbon material and a method of manufacturing the carbon material are provided that can improve hardness and physical properties while fully gaining the benefit of SPS method, which makes it possible to obtain a dense carbon material with very short time. | 09-20-2012 |
20120269716 | Method for Preparing Graphene Sheets from Turbostratic Graphitic Structure and Graphene Sheets Prepared Thereby - The present invention relates to a method for preparing graphene, and more particularly to a method of preparing graphene sheets, which can prepare graphene sheets from a turbostratic graphitic structure such as carbon fiber in higher yield without using a strong oxidizing agent, and to graphene sheets prepared thereby. | 10-25-2012 |
20120269717 | METHOD FOR GROWTH OF HIGH QUALITY GRAPHENE FILMS - The present application relates generally to methods for growth of high quality graphene films. In particular, a method is provided for forming a graphene film using a modified chemical vapor deposition process using an oxygen-containing hydrocarbon liquid precursor. Desirably, the graphene films are a single-layer and have a single grain continuity of at least 1 μm | 10-25-2012 |
20120294793 | PRODUCTION OF GRAPHENE SHEETS AND RIBBONS - A method comprises: physically attaching one or more of metals, metal compounds or oxides to walls of carbon nanotubes; treating the metals, metal compounds or oxides to bond the metals, metal compounds, or oxides chemically to the carbon nanotubes; removing the metals, metal compounds or oxides from the walls of the carbon nanotubes resulting in defected carbon nanotubes; and unzipping the defected carbon nanotubes into graphene sheets or ribbons. | 11-22-2012 |
20120301388 | CRYSTALLINE CARBONACEOUS MATERIAL WITH CONTROLLED INTERLAYER SPACING AND METHOD OF PREPARING SAME - A crystalline carbon material with controlled interlayer spacing and a method of manufacturing the crystalline carbon material are disclosed. The crystalline carbon material has peaks of a (002) plane at 2θ=23°±5.0° and 2θ=26.5°±1.0° when X-ray diffraction is measured using a CuKα ray. The peak height at 2θ=23°±5.0° is higher than the one at 2θ=26.5°±1.0°. | 11-29-2012 |
20120308472 | High Porosity/Low Permeability Graphite Bodies And Process For The Production Thereof - A method of forming a graphitic carbon body employs compression and resistance heating of a stock blend of a carbon material and a binder material. During molding of the body, resistance heating is accompanied by application of mechanical pressure to increase the density and carbonization of the resulting preform body. The preform can then be subjected to a graphitization temperature to form a graphite article. | 12-06-2012 |
20120315213 | METHOD FOR PRODUCING GRAPHITE MATERIAL AND GRAPHITE MATERIAL - There is provided a method for producing a graphite material and a graphite material produced by the method The method includes a kneading step of adding a hydrophobic binding material to a first carbonaceous raw material containing coke powder, followed by heat kneading to obtain a mixture, a pulverizing step of pulverizing the mixture obtained in the kneading step to obtain a second carbonaceous raw material, a granulating step of obtaining a granulated powder using the second carbonaceous raw material obtained in the pulverizing step, a hydrophilic binding material and a solvent, a molding step of subjecting the granulated powder obtained in the granulating step to cold isostatic press molding to obtain a molded body, a burning step of burning the molded body obtained in the molding step to obtain a burnt product, and a graphitizing step of graphitizing the burnt product obtained in the burning step. | 12-13-2012 |
20120321545 | METHOD FOR PRODUCING GRAPHENES THROUGH THE PRODUCTION OF A GRAPHITE INTERCALATION COMPOUND USING SALTS - The present invention relates a method for producing a graphite intercalation compound (GIC) and to the production of graphene using the same. The method of the present invention comprises the following steps: (a) obtaining alkaline metals or alkaline metal ions, or alkaline earth metals or alkaline metal ions, from alkaline metal salts or alkaline earth metal salts; (b) forming a graphite intercalation compound using the alkaline metals or alkaline metal ions, or the alkaline earth metals or alkaline earth metal ions; and (c) dispersing the graphite intercalation compound so as to obtain graphene. As the method of the present invention uses salts which are inexpensive and safe, graphite intercalation compounds can be easily produced at a low cost, and the graphene can be obtained from the thus-produced compounds, thereby reducing the costs of producing the graphene and enabling the easy mass production of the graphene. | 12-20-2012 |
20130004410 | METHOD FOR THE PRODUCTION OF GRAPHITE BODIES - The present invention relates to a method for production of graphite bodies. Carbon bodies are formed from a mixture of electric calcined coke particles calcined at a temperature between 1200 and 3000° C. and a binder where the coke particles have sulphur-and nitrogen content varying between 0 and 1.5% by weight and where the coke particles have an average sulphur content less than 0.6% by weight and a nitrogen content of less than 0.6% by weight, baking of the carbon bodies at a temperature between 700 and 1400° C. and graphitizing of the baked carbon bodies at a temperature above 2300° C. | 01-03-2013 |
20130052121 | CARBON FILM LAMINATE - An object of the present invention is to solve a problem such as a small crystal size, which is the issue of a conventional method for formation of a film of graphene by a thermal CVD technique using a copper foil as a substrate, and thus providing a carbon film laminate in which graphene having a larger crystal size is formed. The carbon film laminate is configured to include a sapphire (0001) single crystal having a surface composed of terrace surfaces which are flat at the atomic level, and atomic-layer steps, a copper (111) single crystal thin film formed by epitaxial growth on the substrate and graphene deposited on the copper (111) single crystal thin film, and thus enabling formation of graphene having a large crystal size. | 02-28-2013 |
20130071313 | Method and Apparatus for Identifying and Characterizing Material Solvents and Composite Matrices and Methods of Using Same - Solvents for macromolecules generally believed to be insoluble in their pristine form are identified by generation of a “solvent resonance” in the relationship between solvent quality (deduced by Rayleigh scattering) and an intrinsic property of solvents. A local extreme of the solvent resonance identifies the ideal intrinsic property of an ideal solvent which may then be used to select a particular solvent or solvent combination. A solvent for graphene is used in the production of transparent conductive electrodes. | 03-21-2013 |
20130084236 | PRODUCTION OF GRAPHENIC CARBON PARTICLES UTILIZING HYDROCARBON PRECURSOR MATERIALS - A method is disclosed for making graphenic carbon particles. The method includes introducing a hydrocarbon precursor material capable of forming a two-carbon-fragment species into a thermal zone, heating the hydrocarbon precursor material in the thermal zone to form the graphenic carbon particles from the hydrocarbon precursor material, and collecting the graphenic carbon particles. Apparatus for performing such a method, and graphenic particles produced by the method, are also disclosed. | 04-04-2013 |
20130084237 | PRODUCTION OF GRAPHENIC CARBON PARTICLES UTILIZING METHANE PRECURSOR MATERIAL - A method is disclosed for making graphenic carbon particles. The method includes introducing a methane precursor material into a thermal zone, heating the methane precursor material in the thermal zone to form the graphenic carbon particles from the methane precursor material, and collecting the graphenic carbon particles. Apparatus for performing such a method, and graphenic particles produced by the method, are also disclosed. | 04-04-2013 |
20130089491 | RAW PETROLEUM COKE COMPOSITION FOR ANODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY - Provided is a raw petroleum coke composition as a raw material of an anode carbon material that can improve, when a battery is discharged at a high current, the ratio capable of maintaining the capacity obtained during discharge at a low current. More specifically, provided is a raw petroleum coke composition for an anode carbon material of a lithium ion secondary battery, the raw petroleum coke composition being produced by subjecting a heavy-oil composition to a delayed coking process, and comprising an atomic ratio of hydrogen atoms H to carbon atoms C(H/C atomic ratio) of 0.30 to 0.50, and a micro-strength of 7 to 17% by weight. Further provided are a method for producing an anode carbon material of a lithium ion secondary battery, comprising the steps of: pulverizing the raw petroleum coke composition into particles having an average particle diameter of 5 to 30 μm, and subjecting the particles to carbonization and/or graphitization; and a lithium ion secondary battery comprising an anode comprising such a carbon material. | 04-11-2013 |
20130101496 | GRAPHITE THERMAL DECONTAMINATION WITH REDUCING GASES - Providing a roaster that operates at temperatures in the range of 800° Celsius to 2000° Celsius with inert, optional oxidizing and reducing gases to treat graphite contaminated with radionuclides including tritium, carbon-14, and chlorine-36. The combination of temperatures and gases allow for the removal of most to substantially all the carbon-14 within the graphite while substantially limiting gasifying the bulk graphite. | 04-25-2013 |
20130101497 | PROCESS FOR THE FORMATION OF FOLIATED FINE GRAPHITE PARTICLES - A low-temperature process for preparing flat carbon based nanostructured material, and namely foliated, fine graphite particles having low thickness and high aspect ratio. The process comprises the steps of: subjecting a particulate graphite to a mechanical attrition treatment in the presence of an alkaline reactant or a mixture comprising the alkaline reactant; exposing the graphite particles to an intercalating solvent to cause the solvent to penetrate between carbon layers of graphite; and delivering an ultrasonic energy into a dispersion of the graphite particles for a period of time sufficient to cause the formation of the nanostructured material. The carbon based nanostructures (CBNS) obtained by this method have a thickness in the range of 4-20 nm and an aspect ratio 500-7000 and various surface chemistry, and can be used as a highly functional graphite material in a wide range of applications, in particular for electrochemical applications in batteries and fuel cells. | 04-25-2013 |
20130101498 | Filmy Graphite and Process for Producing the Same - A process for producing a filmy graphite includes the steps of forming a polyimide film having a birefringence of 0.12 or more and heat-treating the polyimide film at 2,400° C. or higher. | 04-25-2013 |
20130108540 | GRAPHENE PREPARED BY USING EDGE FUNCTIONALIZATION OF GRAPHITE | 05-02-2013 |
20130136684 | GRAPHENE NANO-SHEETS AND METHODS FOR MAKING THE SAME - Various embodiments provide materials and methods for forming a graphene product by vacuum induction heating expandable graphite. The graphene product can include graphene nano-sheets with high purity and uniform thickness. The graphene nano-sheets can contain carbon of more than about 99% by weight. The graphene nano-sheets can be exfoliated or dispersed within a matrix of a semiconducting polymer to form a graphene-containing composite. | 05-30-2013 |
20130156680 | Expandable Graphite Particles and Methods of Making Same - Small particle size expandable graphite materials are described which are highly expandable, as well as methods of making such unique graphite materials. In one embodiment, expandable graphite particles are described having a particle size nominally between about 100 and 200 US mesh, a chromium content of less than 5 parts per million (ppm) and an expansion of about 80 cc/g or greater when heated at about 500° C. | 06-20-2013 |
20130164208 | METHODS OF FORMING GRAPHENE - Disclosed is a method of forming graphene. A graphite positive electrode (or positive electrode together with graphite material) wrapped in a semipermeable membrane and a negative electrode are dipped in an acidic electrolyte to conduct an electrolysis process. As such, a first graphene oxide having a size larger than a pore size of the semipermeable membrane is exfoliated from the graphite positive electrode (or the graphite material). The electrolysis process is continuously conducted until a second graphene oxide is exfoliated from the first graphene oxide, wherein the second graphene oxide has a size which is smaller than the pore size of the semipermeable membrane to penetrate through the semipermeable membrane. The second graphene oxide diffused into the acidic electrolyte outside of the semipermeable membrane is collected. Finally, the collected second graphene oxide is chemically reduced to obtain a graphene. | 06-27-2013 |
20130164209 | METHOD FOR PREPARING GRAPHENE RIBBONS WHERE STRUCTURE IS CONTROLLED - Disclosed is a method for fabricating graphene ribbons which are high-functional carbon materials. Provided a method of fabricating graphene ribbons, including (a) preparing a graphene helix carbon structure which is formed by spiral growing of a unit graphene , and (b) applying energy to the carbon structure to obtain ribbon-shaped graphenes. | 06-27-2013 |
20130164210 | GRAPHITE FILM AND PROCESS FOR PRODUCING GRAPHITE FILM - A graphite film which is low in graphite dust generation can be produced by properly selecting acid dianhydride and diamine which constitute a polyimide film, which polyimide film is a raw material of the graphite film. Specifically, the graphite film which is low in graphite dust generation can be obtained if (1) the acid dianhydride is PMDA and the diamine has a molar ratio of ODA/PDA in a range of 100:0 to 80:20, or (2) the acid dianhydride has a molar ratio of PMDA/BPDA in a range of 80:20 to 50:50, and the diamine has a molar ratio of ODA/PDA in a range of 30:70 to 90:10. | 06-27-2013 |
20130171055 | METHOD FOR MAKING GRAPHENE - In the method for making graphene, an electrolyte solution is formed by dissolving an electrolyte lithium salt in an organic solvent. Lithium ions are separated out from the electrolyte lithium salt in the electrolyte solution. Metal lithium and graphite are disposed in the electrolyte solution, and the metal lithium and the graphite are in contact with each other. In the electrolyte solution, lithium ions and organic solvent molecules jointly insert between adjacent layers of the graphite to form a graphite intercalation compound. The graphene is peeled off from the graphite intercalation compound. | 07-04-2013 |
20130189179 | METHOD AND APPARATUS FOR PRODUCING HIGH YIELDS OF CARBON NANOSTRUCTURES - An apparatus for producing high yields of carbon nanostructures is disclosed. The apparatus includes an electric arc furnace and a feeder that directs solid carbon dioxide into an electrical arc generated by the electric arc furnace. | 07-25-2013 |
20130189180 | Graphite Film and Graphite Composite Film - An object of the present invention is to provide a graphite film, and a graphite composite film both having an excellent thermal diffusivity which can sufficiently manage heat dissipation of electronic instruments, precision instruments and the like, along with an excellent flex resistance which can withstand application to bent portions. | 07-25-2013 |
20130251620 | GRAPHITE MATERIAL FOR NEGATIVE ELECTRODES OF LITHIUM ION SECONDARY BATTERY, MANUFACTURING METHOD FOR SAID MATERIAL, AND LITHIUM ION SECONDARY BATTERY USING SAME - A graphite material for a negative electrode is provided which can suppress capacity degradation due to repeated charging and discharging cycles, storage in a charged state, and floating charging. | 09-26-2013 |
20130266503 | APPARATUS AND METHOD FOR EXFOLIATION OF GRAPHENE - Provided is an apparatus and method for exfoliation of graphene, comprising a chamber which has a through-hole formed at one surface thereof; a cylinder which receives graphite and a volatile material to be vaporized at room temperature and has an opening to be corresponding to the through-hole of the chamber, and which is disposed at an outside of the chamber; a clamp which is disposed in the chamber to pass through the through-hole of the chamber and thus selectively seal the opening of the cylinder; and an operation mechanism which is connected with the clamp and moves the clamp so that the opening of the cylinder is selectively sealed by the clamp. Therefore, it is not necessary to use an acid like sulfuric acid, and it is also not necessary to perform a thermal treatment process for removing sulfuric acid. | 10-10-2013 |
20130272951 | METHOD OF MANUFACTURING GRAPHENE SUBSTRATE, AND GRAPHENE SUBSTRATE - Provided is a graphene substrate, which is manufactured by: bringing a metal layer into contact with a carbon-containing layer and heating the metal layer to dissolve carbon in the carbon-containing layer into the metal layer; and cooling the metal layer to precipitate the carbon in the metal layer as graphene on any substrate surface. | 10-17-2013 |
20130295000 | Nanomaterials and Process for Making the Same - Process for producing nanomaterials such as graphenes, graphene composites, magnesium oxide, magnesium hydroxides and other nanomaterials by high heat vaporization and rapid cooling. In some of the preferred embodiments, the high heat is produced by an oxidation-reduction reaction of carbon dioxide and magnesium as the primary reactants, although additional materials such as reaction catalysts, control agents, or composite materials can be included in the reaction, if desired. The reaction also produces nanomaterials from a variety of other input materials, and by varying the process parameters, the type and morphology of the carbon nanoproducts and other nanoproducts can be controlled. The reaction products include novel nanocrystals of MgO (percilase) and MgAl | 11-07-2013 |
20130309162 | REDUCTION OF GRAPHENE OXIDE TO GRAPHENE IN HIGH BOILING POINT SOLVENTS - A method of creating graphene comprising the steps of dispersing graphene oxide into water to form a dispersion. Where the method further comprises adding a solvent to the dispersion to form a solution, and controlling a temperature of the solution to form graphene. | 11-21-2013 |
20130315814 | GRAPHENE PRODUCTION - Technologies described herein are generally related to graphene production. In some examples, a system is described that may include a first container, a second container, and/or a chamber. The first container may include a first solution with a reducing agent, while the second container may include a second solution with graphene oxide. The chamber may be in operative relationship with the first and the second containers, and configured effective to receive the first and second solutions and provide reaction conditions that facilitate contact of the first and second solutions at an interfacial region sufficient to produce graphene at the interfacial region. | 11-28-2013 |
20130315815 | METHOD AND APPARATUS FOR MANUFACTURING GRAPHENE POWDER AND GRAPHENE POWDER MANUFACTURED USING THE SAME - A method for manufacturing a graphene powder capable of minimizing aggregation of graphene particles and a graphene powder manufactured using the same are disclosed. The method includes preparing a graphene solution in which graphene particles are dispersed in a solvent, aggregating the graphene particles, separating the aggregated graphene particles from the solvent, and drying the graphene particles. | 11-28-2013 |
20130315816 | Bulk preparation of holey graphene via controlled catalytic oxidation - A scalable method allows preparation of bulk quantities of holey carbon allotropes with holes ranging from a few to over 100 nm in diameter. Carbon oxidation catalyst nanoparticles are first deposited onto a carbon allotrope surface in a facile, controllable, and solvent-free process. The catalyst-loaded carbons are then subjected to thermal treatment in air. The carbons in contact with the carbon oxidation catalyst nanoparticles are selectively oxidized into gaseous byproducts such as CO or CO | 11-28-2013 |
20130323158 | Method of Laser Direct Synthesis of Graphene - A method of forming single and few layer graphene on a quartz substrate in one embodiment includes providing a quartz substrate, melting a portion of the quartz substrate, diffusing a form of carbon into the melted portion to form a carbon and quartz mixture, and precipitating at least one graphene layer out of the carbon and quartz mixture. | 12-05-2013 |
20130323159 | NOVEL GRAPHENE OXIDE REDUCING AGENT AND METHOD FOR PREPARING REDUCED GRAPHENE OXIDE USING THE SAME - An agent for reducing graphene oxide and a method for preparing reduced graphene oxide or graphene are provided. An agent for reducing graphene oxide include a mixture of a reducing agent containing a halogen element with trifluoroacetic acid (CF | 12-05-2013 |
20140004033 | METHOD FOR PRODUCING GRAPHITE FILM AND METHOD FOR PRODUCING CARBONIZED FILM | 01-02-2014 |
20140017159 | COMPOSITION FOR PREPARING ARTIFICIAL GRAPHITE ELEMENT, POWDERY MATERIAL, AND METHOD FOR FABRICATING THE ELEMENT - A composition for producing an artificial graphite element and a method for producing the same are provided. The composition includes a carbon-containing raw material such as fly ash, an adhesive, and a dispersant. The method for producing the artificial graphite element of the present invention includes the steps of mixing the above composition; baking the mixed composition to obtain powder having a plurality of particles; screening the powder to select particles having suitable particle diameters; molding the plurality of screened particles into an article; heating the article at 500 to 1000° C.; and graphitizing the heated article to obtain the artificial graphite element. The method of the present invention is simple and cost-effective. The artificial graphite element produced has a considerably large specific surface area due to its porous property, such that it is suitable for use as a heat-dissipating substrate. | 01-16-2014 |
20140017160 | METHOD AND APPARATUS FOR MANUFACTURING GRAPHENE - A method and an apparatus for synthesizing graphene. The method includes loading catalyst metals into a chamber in the horizontal direction or the vertical direction; increasing sizes of grains of the catalyst metals by heating the catalyst metals; raising a temperature inside the chamber while providing a vapor carbon source in the catalyst metals; and forming graphene by cooling the catalyst metals. | 01-16-2014 |
20140050652 | GRAPHENE AND ITS GROWTH - The present invention provides graphene nuclei including monolayer single-crystalline graphene nuclei and a method of growing from them two-dimensional graphene dendrites, with aspect ratio of the main branches increasing with growth time, on catalytic metal surface using thermal chemical vapor deposition. By controlling the supply rates of the carbon etching gas and the carbon deposition species, it results in graphene branches being merged to form a two-dimensional monolayer single-crystalline graphene plate and further allows multiple graphene plates to merge and form a large-area continuous monolayer graphene plate. | 02-20-2014 |
20140056801 | Filmy Graphite and Process for Producing the Same - A process for producing a filmy graphite includes the steps of forming a polyimide film having a birefringence of 0.12 or more and heat-treating the polyimide film at 2,400° C. or higher. | 02-27-2014 |
20140065056 | GRAPHITE MATERIAL FOR NEGATIVE ELECTRODES OF LITHIUM ION SECONDARY BATTERY, MANUFACATURING METHOD FOR SAID MATERIAL, AND LITHIUM ION SECONDARY BATTERY USING SAME - A graphite material for a negative electrode is provided which can suppress capacity degradation due to repeated charging and discharging cycles, storage in a charged state, and floating charging. | 03-06-2014 |
20140079622 | CARBON MATERIAL FOR NEGATIVE ELECTRODE OF LITHIUM SECONDARY BATTERY AND METHOD FOR PRODUCING THE SAME - To provide a negative electrode carbon material capable of suppressing capacity degradation which will occur due to repetition of a charge/discharge cycle, storage under a charged state, float charging, or the like. An artificial graphite for a negative electrode of a lithium secondary battery having a c-axis crystallite size L (112) of from 2.0 to 4.2 nm as calculated from a (112) diffraction line obtained by X-ray wide-angle diffractometry and having a half-value width Δν | 03-20-2014 |
20140079623 | METHOD OF FORMING HIGH-QUALITY GRAPHENE USING CONTINUOUS HEAT TREATMENT CHEMICAL VAPOR DEPOSITION - Provided is a method of forming graphene having an increased grain size. In the method, a substrate including a catalyst layer formed of a transition metal is loaded into a chamber and a gaseous carbon source is supplied into the chamber. A continuous heat treatment in which the catalyst layer is locally heated while moving a heated area of the catalyst layer is performed to dissolve a carbon component in the catalyst layer and extract graphene on a surface of the catalyst layer from the dissolved carbon component. | 03-20-2014 |
20140120030 | CARBON MATERIALS BASED ON ORGANIC NANOFILM USING THERMAL EVAPORATION AND METHOD FOR PREPARING THE SAME - Provided is a method for preparing a carbon material based on an organic nanofilm using thermal evaporation, including: depositing a liquid polymer or polymer solution containing a polymer and a solvent onto a substrate, thereby forming an organic nanofilm; stabilizing the organic nanofilm so that the carbon atoms in the organic nanofilm have a cyclic arrangement; and carbonizing the stabilized organic nanofilm, thereby forming a carbon material, wherein the organic nanofilm is formed from the liquid polymer or polymer solution through a thermal evaporation process. The method provides a carbon material with a thickness, sheet resistance and surface roughness suitable for various applications and allows control thereof. In addition, the method uses a relatively inexpensive starting material, pitch, thereby reducing the overall production cost, and avoids a need for a complicated additional patterning operation, so that the carbon material is applied directly to electronic devices. | 05-01-2014 |
20140127124 | GRAPHITIZATION FURNACE AND METHOD FOR PRODUCING GRAPHITE - A graphitization furnace ( | 05-08-2014 |
20140140917 | PROCESS FOR PRODUCING GRAPHENE - A process for producing graphene by providing a plurality of metallic particles as templates for graphene formation and providing a carbon source; reacting the metallic particles and carbon source under conditions suitable for graphene formation; and forming graphene particles on the metallic particles. The graphene particles formed on the metallic particles are of a size and shape substantially corresponding to the size and shape of the metallic particles. | 05-22-2014 |
20140154165 | METHOD FOR PREPARING GRAPHENE BY USING TWO-DIMENSIONAL CONFINED SPACE BETWEEN THE LAYERS OF INORGANIC LAYERED MATERIALS - The present invention relates to a method for preparing graphene using the two-dimensional confined space between the layers of inorganic layered materials. Such method comprises the following steps: mix a soluble salt of a divalent metal ion M | 06-05-2014 |
20140154166 | EXFOLIATION OF GRAPHENE BY MULTILAYER COEXTRUSION - Exfolilation of graphene from graphite using multilayer coextrusion is generally disclosed. In some example embodiments, graphite may be dispersed within a first processing material, and the first processing material and a second processing material may be co-extruded through a plurality of series coupled layer multiplication dies to exfoliate graphene from the graphite. The graphene may be separated from the resulting multi-layered material. In some example embodiments, graphite flake and/or expanded graphite may be dispersed within the first processing material. | 06-05-2014 |
20140161712 | LOW-TEMPERATURE METHOD AND SYSTEM OF MANUFACTURING SPHEROIDAL GRAPHITE - A low-temperature graphite manufacturing method and a system thereof are disclosed. A graphite cast iron smelting manufacturing technique is used for melting a cast iron, for forming a cast iron melt. A graphitizing agent, a nucleating agent, and a spheroidizing agent are continuously added into the cast iron melt, for making the carbon powder be graphitized and spheroidized. Within the cast iron melt, the amounts of the carbon, the graphitizing agent, the nucleating agent, and the spheroidized agent are adjusted for making the spheroidal graphite be able to continuously float out of the cast iron melt. After that, by using gas blowing and electrostatic dust removal, the powdered graphite can be collected. At last, the gases are recycled and the collected powdered graphite is purified by acid pickling. | 06-12-2014 |
20140170057 | METHOD AND APPARATUS FOR MANUFACTURING GRAPHENE SHEET - Disclosed is an apparatus for manufacturing graphene sheets. The apparatus includes a gas tube, and a hydrocarbon gas source connected to a front part of the gas tube for providing a hydrocarbon gas through the gas tube. The apparatus also includes a microwave generator to generate a microwave passing a middle part of the gas tube through a waveguide tube to form a microwave plasma torch from the hydrocarbon gas, wherein the hydrocarbon gas is cracked by the microwave plasma torch to form graphene sheets. The apparatus includes a tube collector connected to a back part of the gas tube for collecting the graphene sheets. | 06-19-2014 |
20140178289 | HIGH-DENSITY 3D GRAPHENE-BASED MONOLITH AND RELATED MATERIALS, METHODS, AND DEVICES - A composition comprising at least one high-density graphene-based monolith, said monolith comprising a three-dimensional structure of graphene sheets crosslinked by covalent carbon bonds and having a density of at least 0.1 g/cm | 06-26-2014 |
20140205532 | METHOD FOR PRODUCING ELECTRODE MATERIAL FOR LITHIUM ION BATTERIES - A method for producing a graphie material for an electrode material for lithium ion batteries, including a step for exothermically graphitizing a carbon material by directly passing an electric current therethrough. The carbon material has an compact powder resistivity of 0.4 Ω·cm or less when compressed to a density of 1.4 g/cm | 07-24-2014 |
20140234200 | GROWTH OF GRAPHENE FILMS FROM NON-GASEOUS CARBON SOURCES - In various embodiments, the present disclosure provides methods of forming graphene films by: (1) depositing a non-gaseous carbon source onto a catalyst surface; (2) exposing the non-gaseous carbon source to at least one gas with a flow rate; and (3) initiating the conversion of the non-gaseous carbon source to the graphene film, where the thickness of the graphene film is controllable by the gas flow rate. Additional embodiments of the present disclosure pertain to graphene films made in accordance with the methods of the present disclosure. | 08-21-2014 |
20140241975 | Process for the Production of Graphene Nanoribbons - The invention refers to a process for the production of graphene nanoribbons in the presence of an anisotropic metal surface which induces a spatial orientation of the nanoribbons. | 08-28-2014 |
20140248207 | GRAPHENE-CARBON NANOTUBE NANOSTRUCTURE AND METHOD OF MANUFACTURING SAME - Disclosed are a method of manufacturing a graphene-carbon nanotube nanostructure which includes mixing graphite, a catalytic metal, and an ionic liquid, and then radiating microwaves on the mixture, and a graphene-carbon nanotube nanostructure manufactured using the method. | 09-04-2014 |
20140255292 | METHOD FOR PRODUCING ELECTRODE MATERIAL FOR LITHIUM ION BATTERIES - A method for producing a graphite material for lithium ion batteries, including a step for exothermically graphitizing a carbon material by directly applying an electric current therethrough. The carbon material is obtained by heating at a temperature in the range of 800° C.-1500° C. inclusive and subsequently pulverizing an organic carbon starting material, has a compact powder resistivity of 0.3 Ωcm or less when compressed to a density of 1.4 g/cm | 09-11-2014 |
20140271444 | FRACTIONATION OF 2-DIMENSIONAL PLATE PARTICLES BY SIZE SELECTIVE ADHESION WITH SPHERICAL PARTICLES - The present disclosure relates to a method for size-selective separation of 2-dimensional plate particles using spherical particles. Since the separation method of 2-dimensional plate particles according to the present disclosure is simple, economical and extensible to large-scale applications, it can contribute greatly to commercialization of plate particles by reducing cost and preventing deterioration of physical properties. The 2-dimensional plate particles having uniform size can be useful in such applications as transparent electrodes, solar cells, composites, drug delivery, biosensors, etc. | 09-18-2014 |
20140301935 | OLIGOPHENYLENE MONOMERS AND POLYMERIC PRECURSORS FOR PRODUCING GRAPHENE NANORIBBONS - Oligophenylene monomers for the synthesis of polymeric precursors for the preparation of graphene nanoribbons, the polymeric precursors, and methods for preparing them, as well as methods for preparing the graphene nanoribbons from the polymeric precursors and the monomers are provided. | 10-09-2014 |
20140301936 | GRAPHENE NANORIBBON PRECURSORS AND MONOMERS SUITABLE FOR PREPARATION THEREOF - Provided are graphene nanoribbon precursors comprising repeated units of the general formula (I) in which R | 10-09-2014 |
20140308196 | CARBON DIOXIDE FIXATION METHOD USING CONDENSATION POLYMERIZATION, POLYMER MATERIAL PREPARED THEREBY, METHOD FOR RECOVERING CARBON FROM SAID POLYMER MATERIAL, AND GRAPHITE GENERATED BY SAID CARBON RECOVERY METHOD - This invention relates to a method of fixing carbon dioxide by condensation polymerization in an acidic aqueous medium, thereby increasing fixation efficiency and remarkably reducing the volume of generated material compared to conventional carbon dioxide fixation methods; a polymer material prepared by the method; and a method of recovering carbon therefrom. According to the current invention, the method of fixing carbon dioxide is characterized by introducing carbon dioxide pressurized to a pressure higher than atmospheric pressure into a reactor containing a acidic aqueous medium, so that carbonic acid resulting from dissolving carbon dioxide is made into a polymer material by condensation polymerization, thereby fixing carbon dioxide, and heating the polymer material so as to recover carbon. | 10-16-2014 |
20140314656 | GRAPHENE PRODUCTION METHODS AND RESULTANT PRODUCTS - The present invention relates to a method of mass production of graphene. In one embodiment, such a method may include providing a high temperature furnace for storing a molten solvent, wherein the high temperature furnace comprises an outlet disposed on the top of the high temperature furnace, and an inlet, providing a carbon source to mix with the molten solvent, precipitating the carbon to form a graphene layer on the surface of the molten solvent under a supersaturated state, and collecting the graphene layer from the outlet. | 10-23-2014 |
20140335010 | PROCESS FOR HIGH-YIELD PRODUCTION OF GRAPHENE VIA DETONATION OF CARBON-CONTAINING MATERIAL - A method of producing pristine graphene particles through a one-step, gas-phase, catalyst-free detonation of a mixture of one or more carbon-containing compounds hydrocarbon compounds and one or more oxidizing agents is provided. The detonation reaction occurs very quickly and at relatively high temperature, greater than 3000 K, to generate graphene nanosheets that can be recovered from the reaction vessel, such as in the form of an aerosol. The graphene nanosheets may be stacked in single, double, or triple layers, for example, and may have an average particle size of between about 35 to about 250 nm. | 11-13-2014 |
20140335011 | METHOD FOR PREPARING GRAPHENE - The present invention relates to a method for preparing graphene substantially free of contamination by metallic, magnetic, organic and inorganic impurities, and also to the use of the resulting graphene for the production of transparent electrodes, batteries, electron-acceptor or electron-donor materials, in particular in photovoltaic systems, photovoltaic panels, transistor channels, in particular in electronics, nonlinear emitters or absorbers of infrared photons, current-conducting electrodes, anti-static coatings, chemical detectors, vias and interconnections in electronics, current-conducting cables, and solar cells. | 11-13-2014 |
20140356277 | PRODUCTION OF GRAPHENE USING ELECTROMAGNETIC RADIATION - Methods for converting graphite oxide into graphene by exposure to electromagnetic radiation are described. As an example, graphene oxide may be rapidly converted into graphene upon exposure to converged sunlight. | 12-04-2014 |
20140363363 | METHOD FOR PRODUCING CATALYTIC METAL LAYER AND METHOD FOR PRODUCING GRAPHENE MATERIAL - A rectangular substrate | 12-11-2014 |
20140377159 | DISPERSION METHOD - A method for producing a solution of dispersed graphenes comprising contacting graphite having a dimension in the a-b plane of 10 μm or less with an electronic liquid comprising a metal and a polar aprotic solvent, and solutions of dispersed graphenes which may be obtained by such a method are described. | 12-25-2014 |
20140377160 | COMBUSTION SYNTHESIS OF GRAPHENE AND CARBONOUS NANOMATERIALS - The invention provides methods for the combustion synthesis (CS) of graphene by a novel exothermic self-sustained reaction between a refractory ceramic compound and a carbon-containing polymer under an inert gas atmosphere. The synthesis of graphene was confirmed by both transmission electron microscopy and Raman spectroscopy. The graphene produced has very low (<1 wt. %) oxygen content. Fluorocarbon gases released due to decomposition of the carbon-containing polymer in the combustion wave can reduce the ceramic to a gas and mesoporous carbon particles and graphene layers. The method does not require an external energy source because it occurs in a self-sustained synergetic manner after ignition. The methods are flexible in terms of tuning the synthesis conditions for desired products, and the method can be scaled to provide kilogram quantities. | 12-25-2014 |
20140377161 | METHOD FOR PRODUCING FLAKE GRAPHITE, AND FLAKE GRAPHITE - There is provided a method for producing relatively easily handleable exfoliated graphite by exfoliating graphite without complicated steps, and exfoliated graphite obtained by the method. A method for producing exfoliated graphite, comprising steps of preparing a composition which comprises graphite or primary exfoliated graphite and a polymer and in which the polymer is fixed to the graphite or primary exfoliated graphite; and pyrolyzing the polymer contained in the composition to exfoliate the graphite or primary exfoliated graphite and remove the polymer by pyrolysis. | 12-25-2014 |
20150064098 | PROCESS FOR PRODUCING TWO-DIMENSIONAL NANOMATERIALS - The present invention provides a process for producing a two-dimensional nanomaterial by chemical vapour deposition (CVD), the process comprising contacting a substrate in a reaction chamber with a first flow which contains hydrogen and a second flow which contains a precursor for said material, wherein the contacting takes place under conditions such that the precursor reacts in the chamber to form said material on a surface of the substrate, wherein the ratio of the flow rate of the first flow to the flow rate of the second flow is at least 5:1. Two-dimensional nanomaterials obtainable by said process are also provided, as well as devices comprising said nanomaterials. | 03-05-2015 |
20150093324 | GRAPHENE COMPOSITIONS AND METHODS OF MAKING THE SAME - Compositions comprising graphene and methods for preparing graphene are described. | 04-02-2015 |
20150098891 | METHOD FOR MANUFACTURING GRAPHENE FILM, GRAPHENE FILM MANUFACTURED BY SAME, ELECTRONIC DEVICE COMPRISING THE GRAPHENE FILM - A method for manufacturing graphene is provided, comprising (1) introducing a supporting substrate in a reactor; (2) preparing (nano) crystalline alumina catalyst having catalytic activity on the supporting substrate to prepare an insulating substrate; (3) growing nano graphenes on the insulating substrate to manufacture graphene film comprising graphene layer of the nano graphenes, which are grown without use of metal catalyst substantially. The graphene layer composed of the nano graphene has spatially homogeneous structural and electrical properties even in synthesis as large area and can be applied to flexible electronic devices. | 04-09-2015 |
20150110706 | Hydrogen Surface-Treated Graphene, Formation Method Thereof and Electronic Device Comprising The Same - The present invention relates to hydrogen surface-treated graphene, a formation method thereof, and an electronic device including the same. The graphene according to one exemplary embodiment of the present invention can be useful in preparing hydrogen surface-treated graphene having a band gap using simple methods through indirect hydrogen plasma treatment. Also, the graphene according to one exemplary embodiment of the present invention can be useful in forming two regions having different band gaps through the indirect hydrogen plasma treatment, and thus can be useful in reducing the processing time and the processing cost since the graphene is directly applicable to electronic devices such as transistors, and touch panels. | 04-23-2015 |
20150118143 | METHOD OF FABRICATING GRAPHENE QUANTUM DOTS AND HIGH QUALITY GRAPHENE QUANTUM DOTS USING THE METHOD - A simple and easy method for fabricating graphene quantum dots with uniformed size and high quality of emission property comprises steps of, mixing graphite powders with metallic hydrate salts, forming an intercalation compound of graphite wherein metal ions are inserted by heating the mixed solution, and removing the metal ions from the intercalation compound of graphite. The graphene quantum dots is applicable to the development of electronic products in next generation such as display devices, recording devices, various sensors and nanocomputers and is applicable to biological and medicinal field as well. | 04-30-2015 |
20150298978 | GRAPHENE, AND APPARATUS FOR MANUFACTURING THE SAME - The present invention relates to technique for manufacturing graphene, more particularly, to graphene and an apparatus for manufacturing graphene which is manufactured massively using physical characteristic of graphite itself and exfoliating or transferring mechanism of various adhesive structures. The present invention also relates to graphene and an apparatus for manufacturing graphene generated by being seceded from at least one of the structures, after being exfoliated or transferred from a type of graphite material to at least one of structure, or generated by being seceded from at least one structure among a plurality of structures, after being continuously exfoliated or transferred from a type of graphite material to the plurality of structures. | 10-22-2015 |
20150299381 | POLYMERIC PRECURSORS FOR PRODUCING GRAPHENE NANORIBBONS AND SUITABLE OLIGOPHENYLENE MONOMERS FOR PREPARING THEM - The invention relates to oligophenylene monomers of general formula I, wherein R | 10-22-2015 |
20150307356 | Methods for Synthesizing Graphene from a Lignin Source - Embodiments of the presently-disclosed subject matter include methods for synthesizing carbon nanomaterials from a lignin and/or source thereof. Exemplary methods comprise a process of thermal treating a lignin and/or source thereof in the presence of a catalyst to synthesize graphene nanosheets. | 10-29-2015 |
20150315024 | METHOD FOR OBTAINING SOLID GRAPHENE SAMPLES OR SUSPENSIONS - Method for obtaining solid samples or suspensions of graphene optionally doped with heteroatoms from synthetic or natural polymers, which are subjected to pyrolysis in a furnace without oxygen at temperatures of between 400° C. and 1,200° C. and subsequently to a liquid-phase exfoliation phase. The polymers used are preferably polysaccharides, such as chitosan, alginate and alginic acid, which can be optionally doped with any heteroatom. The invention is intended primarily for use in microelectronics and photovoltaic devices in which graphene sheets are very useful. In addition, the graphene prepared cn be uses as an additive for polymers and ceramic materials. | 11-05-2015 |
20150344311 | METHOD FOR MANUFACTURING REDUCED GRAPHENE OXIDE USING SOLID HYDRAZINE DERIVATIVE - The present invention relates to a method for preparing reduced graphene oxide from graphene oxide using a solid hydrazine derivative. | 12-03-2015 |
20150360953 | METHOD FOR PREPARING GRAPHITE USING MICROWAVES - The present invention relates to a method for preparing graphite using microwaves, the method comprising: a step for preparing carbon powder; a step for mixing the carbon powder with metal particles to prepare a carbon-metal mixture; and a step for applying microwaves to the carbon-metal mixture. As such, the present invention can obtain high quality graphite from the carbon powder by using microwaves. | 12-17-2015 |
20150360957 | Sorting Two-Dimensional Nanomaterials by Thickness - The Present teachings provide, in part, methods of separating two-dimensional nanomaterials by atomic layer thickness. In certain embodiments, the present teachings provide methods of generating graphene nanomaterials having a controlled number of atomic layer(s). | 12-17-2015 |
20150376012 | Nanomaterials and Process for Making the Same - Process for producing nanomaterials such as graphenes, graphene composites, magnesium oxide, magnesium hydroxides and other nanomaterials by high heat vaporization and rapid cooling. In some of the preferred embodiments, the high heat is produced by an oxidation-reduction reaction of carbon dioxide and magnesium as the primary reactants, although additional materials such as reaction catalysts, control agents, or composite materials can be included in the reaction, if desired. The reaction also produces nanomaterials from a variety of other input materials, and by varying the process parameters, the type and morphology of the carbon nanoproducts and other nanoproducts can be controlled. The reaction products include novel nanocrystals of MgO (percilase) and MgAl | 12-31-2015 |
20150376013 | METHOD FOR PRODUCING FEW-LAYER GRAPHENE - A method of producing single or few-layer graphene comprises exfoliating graphite with a polymer to form a graphene-polymer composite and subsequently treating the composite to disassociate graphene. The exfoliation process is conducted using sonication. The graphene is disassociated from the polymer by a treatment step such as acid hydrolysis. The method results in highly pure graphene. | 12-31-2015 |
20160016802 | GRANULES OF GRAPHENE OXIDE BY SPRAY DRYING - Granules of graphene oxide may be produced from a dispersion of nanoscale graphene oxide sheets by a spray drying method. Such granules have a three-dimensional corrugated morphology. The complexity of the corrugations, and the s size distribution of the granules can be varied through selection of the spray-drying equipment used, and variation of the composition of the dispersion and the spray-drying parameters. Structural modifiers may be included in the graphene oxide dispersion to control the ultimate morphology of the granules. The granules of graphene oxide may be thermally reduced at a moderate temperature of 220° C. to increase the granules' electrical conductivity. The reduced granules may be used to fabricate electrodes for supercapacitors. The power and energy density of such an electrode material is comparable to those of conventional/commercial activated carbon-based electrodes. | 01-21-2016 |
20160059444 | Production of highly conductive graphitic films from polymer films - A one-step (direct graphitization) process for producing a graphitic film, comprising directly feeding a precursor polymer film, without going through a carbonization step, to a graphitization zone preset at a graphitization temperature no less than 2,200° C. for a period of residence time sufficient for converting the precursor polymer film to a porous graphitic film having a density from 0.1 g/cm | 03-03-2016 |
20160060119 | POTATOLIKE SHAPED GRAPHITE PARTICLES WITH LOW IMPURITY RATE AT THE SURFACE, PROCESS FOR PREPARING SAME - A method for modifying graphite particles having a prismatic shape or a cylindrical shape characterized by an edge function fe and a basal function fb, said method providing increase of the edge function and lowering of the basal function, wherein the method includes submitting the graphite particles to at least one physical means selected from attrition, jet mill, ball mill, hammer mill, or atomizer mill, in the presence of at least one chemical compound chosen from the group of compounds of the formula MF | 03-03-2016 |
20160096734 | Method of Producing a Freestanding Thin Film of Nano-Crystalline Carbon - A freestanding thin film of nano-crystalline graphite is described, as well as a method of producing a freestanding thin film of nano-crystalline graphite including:
| 04-07-2016 |
20160096735 | METHOD FOR PREPARATION AND SEPARATION OF ATOMIC LAYER THICKNESS PLATELETS FROM GRAPHITE OR OTHER LAYERED MATERIALS - A method and system of separating graphene nanoplatelets (GNPs) from initial graphite raw material is disclosed. The raw material is exfoliated to create a percentage of separated GNPs in a resulting bulk mixture. Agglomerates between the separated graphene nanoplatelets are broken. The mixture is separated into fractions having nanoparticles of different GNP content and size distribution. Each different range of nanoparticles is separated into GNPs and graphite nanopowder via a medium flow process or via electrostatic separation or both. | 04-07-2016 |
20160101980 | GRAPHITE-BASED CARBON MATERIAL USEFUL AS GRAPHENE PRECURSOR, AS WELL AS METHOD OF PRODUCING THE SAME - Provided is a graphite-based carbon material useful as a graphene precursor, from which graphene is easily exfoliated when the graphite-based carbon material is useful as a precursor and from which a highly-concentrated graphene dispersion can easily be obtained. The graphite-based carbon material is a graphite-based carbon material useful as a graphene precursor wherein a Rate ( | 04-14-2016 |
20160137508 | GRAPHENE QUANTUM DOTS WITH DIFFERENT TYPES AND METHOD FOR OBTAINING EACH OF DIFFERENT TYPES OF GRAPHENE QUANTUM DOTS - The present application provides a method for producing a graphene quantum dot using thermal plasma, comprising injecting a carbon source into a thermal plasma jet to pyrolyze the carbon source so as to form a carbon atomic beam and allowing the carbon atomic beam to flow in a tube connected to an anode to produce a graphene quantum dot. The present application also provides an isolated graphene quantum dot from different types of graphene quantum dots and method for obtaining each of an isolated graphene quantum dot from different types of graphene quantum dots. | 05-19-2016 |
20160145106 | PREPARATION METHOD FOR GRAPHITIZING CARBON MATERIAL - A preparation method for graphitized carbon material is disclosed. The method may include placing a water-cooled copper mold having a water-cooling equipment at a bottom thereof in a vacuum arc melting furnace, wherein the water-cooled copper mold has disposed thereon a graphite crucible with carbon material therein and the graphite crucible has a tungsten rod placed thereon, with a lower terminal of the tungsten rod and the carbon material within the graphite crucible aligning. The method may further include flowing a gas after placing the vacuum arc melting furnace in a vacuum environment before heating the vacuum arc melting furnace to at least 3200 degrees Celsius to graphitize the carbon material and to form a fully graphitized carbon material after cooling. | 05-26-2016 |
20160145108 | METHOD FOR MANUFACTURING GRAPHENE PLATELETS - A method for manufacturing graphene platelets includes the following steps of: providing a plurality of graphite blocks each including a plurality of stacked graphene layers, between every two graphene layers being a bonding formed by a van der Waals force; applying a shear airflow produced by an airflow interface formed between a first flow path and a second flow path by a forward airflow and reverse airflow to the graphite block, the shear airflow having an energy sufficient for damaging the van der Waals force to disengage a part of the graphene layers; and collecting a plurality of pieces of the graphene platelets, the graphene platelets including one or multiple of the graphene layers. Thus, the shear airflow of the present invention disengages the graphene layers from the graphite block to form the graphene platelets, thereby providing a simple manufacturing process and promoting mass production at a fast speed. | 05-26-2016 |
20160176714 | METHOD AND APPARATUS FOR MODIFYING GRAPHENE | 06-23-2016 |
20160194207 | METHOD FOR EXFOLIATING CARBONACEAOUS MATERIALS CONTAINING GRAPHITE, ASSISTED BY A DIELS-ALDER REACTION | 07-07-2016 |
20160200579 | CARBON PRODUCTS DERIVED FROM LIGNIN/CARBON RESIDUE | 07-14-2016 |
20160200581 | GRAPHENE, METHOD AND APPARATUS FOR PREPARING GRAPHENE | 07-14-2016 |
20160200582 | GRAPHENE QUANTUM DOTS SYNTHESIS METHOD | 07-14-2016 |
20170233256 | BLOCK COPOLYMER, AND METHOD FOR PREPARING GRAPHENE USING THE SAME | 08-17-2017 |