Patent application number | Description | Published |
20080251971 | Electrode for supercapacitor having metal oxide deposited on ultrafine carbon fiber and the fabrication method thereof - The present invention discloses an improved electrode for a supercapacitor and a method of preparation thereof. The inventive electrode comprises a collector, a carbon substrate disposed on the collector comprising ultrafine carbon fibers having a specific surface area of at least 200 m | 10-16-2008 |
20080274403 | ANODE FOR SECONDARY BATTERY HAVING NEGATIVE ACTIVE MATERIAL WITH NANO-FIBER NETWORK STRUCTURE AND SECONDARY BATTERY USING THE SAME, AND FABRICATION METHOD OF NEGATIVE ACTIVE MATERIAL FOR SECONDARY BATTERY - There is provided a metal oxide having a continuous nano-fiber network structure as a negative active material for a secondary battery. A method for fabricating such negative active material for a secondary battery comprises spinning a mixed solution of a metal oxide precursor and a polymer onto a collector to form composite fibers mixed with the metal oxide precursor and the polymer, thermally compressing or thermally pressurizing the composite fibers, and thermally treating the thermally compressed or thermally pressurized composite fibers to remove the polymer from the composite fiber. | 11-06-2008 |
20090026662 | HYBRID POLYMER ELECTROLYTE, A LITHIUM SECONDARY BATTERY COMPRISING THE HYBRID POLYMER ELECTROLYTE AND THEIR FABRICATION METHODS - The present invention provides a novel hybrid polymer electrolyte, a lithium secondary battery comprising the hybrid polymer electrolyte polymer and their fabrication methods. More particularly, the present invention provides the hybrid polymer electrolyte comprising superfine fibrous porous polymer matrix with particles having diameter of 1-3000 nm, polymers and lithium salt-dissolved organic electrolyte solutions incorporated into the porous polymer matrix. The hybrid polymer electrolyte has advantages of better adhesion with electrodes, good mechanical strength, better performance at low and high temperatures, better compatibility with organic electrolytes of a lithium secondary battery and it can be applied to the manufacture of lithium secondary batteries. | 01-29-2009 |
20090056808 | DYE-SENSITIZED SOLAR CELL WITH METAL OXIDE LAYER CONTAINING METAL OXIDE NANOPARTICLES PRODUCED BY ELECTROSPNNING AND METHOD FOR MANUFACTURING SAME - A dye-sensitized solar cell having improved photoelectric conversion characteristic includes a metal oxide layer having dye-adsorbed metal oxide nanoparticles, wherein the metal oxide nanoparticles are formed by electrospinning a mixed solution of a metal oxide precursor and a polymer into ultrafine composite fibers, and thermally compressing and sintering the ultrafine composite fibers. | 03-05-2009 |
20090212695 | White and color photoexcitation light emitting sheet and method for the fabrication thereof - The present invention relates to a white and color photoexcitation light emitting sheet comprising a substrate, a light source formed on the substrate, and a white and color photoexcitation light emitting layer capable of converting a light emitted from the light source into a light having a different wavelength, where the white and color photoexcitation light emitting layer is fabricated by mixing a matrix polymer, white and color photoexcitation light emitting materials and a solvent, spinning the resulting mixture to prepare an ultrafine composite fiber layer of the matrix polymer/photoexcitation light emitting materials, and thermocompressing the ultrafine composite fiber layer; and a method for fabrication thereof. The white and color photoexcitation light emitting sheet according to the present invention has uniform brightness and color coordinates and exhibits high color reproducibility. | 08-27-2009 |
20100002357 | CONDUCTIVE ELECTRODE USING METAL OXIDE FILM WITH NETWORK STRUCTURE OF NANOGRAINS AND NANOPARTICLES, PREPARATION METHOD THEREOF AND SUPERCAPACITOR USING THE SAME - The present invention relates to a porous conducting metal oxide electrode prepared by depositing a porous conducting metal oxide film comprising a conducting metal oxide film layer having a network structure of nanofibers, comprising nanograins or nanoparticles, on at least one surface of a current collector, and a conducting metal oxide coating layer on the network layer of the porous conducting metal oxide through the constant current method or the cyclic voltammetric method, and a high-speed charge/discharge and ultrahigh-capacity supercapacitor using the porous conducting a metal oxide electrode. | 01-07-2010 |
20100021794 | METHOD OF FABRICATING CARBON MATERIAL, CARBON MATERIAL PREPARED BY THE METHOD, CELL MATERIAL AND APPARATUS USING THE SAME - Disclosed is a method for fabricating a carbon material, by which carbon fibers or carbon tubes, particularly branched carbon fibers or carbon tubes, are obtained via a so-called self-growing process without using external carbon sources. The carbon material obtained by the method has a large specific surface area and further includes a metal catalyst, and thus may be used in cell materials for a fuel cell or secondary battery, hydrogen storage devices, capacitors, solar cells, display panel or the like. | 01-28-2010 |
20100084007 | MODIFIED CARBON NANOTUBE GRAFTED BY LIVING POLYMER, CARBON NANOTUBE ELECTRODE AND DYE-SENSITIZED SOLAR CELL USING THE SAME, AND EACH PREPARATION METHOD THEREOF - Disclosed are to provide a modified carbon nanotube obtained by reacting a polymer to a carbon nanotube by a radical graft method, capable of minimizing lowering of a physical property of a carbon nanotube caused when being modified, and capable of enhancing dispersibility of the carbon nanotube and an adhesion strength between carbon nanotubes, the polymer having a molecular weight controlled by a living radical polymerization and still having a living radical end group. | 04-08-2010 |
20100084008 | DYE-SENSITIZED SOLAR CELL COMPRISING METAL OXIDE NANOBALL LAYER AND PREPARATION METHOD THEREOF - A dye-sensitized solar cell comprising a semiconductor electrode prepared by spraying a metal oxide nanoparticle dispersion on a conductive substrate using an electric field to form a metal oxide nanoball layer which is composed of agglomerated metal oxide nanoparticles and has a high porosity and specific surface area, exhibits improved photoelectric properties even when a gel or solid electrolyte is used. | 04-08-2010 |
20100221863 | DYE-SENSITIZED SOLAR CELL BASED ON ELECTROSPUN ULTRA-FINE TITANIUM DIOXIDE FIBERS AND FABRICATION METHOD THEREOF - A dye-sensitized solar cell comprising a semiconductor electrode comprising electrospun ultra-fine titanium dioxide fibers and fabrication method thereof are disclosed. The dye-sensitized solar cell comprises a semiconductor electrode comprising an electrospun ultra-fine fibrous titanium dioxide layer, a counter electrode and electrolyte interposed therebetween. A non-liquid electrolyte such as polymer gel electrolyte or the like having low fluidity, as well as the liquid electrolyte, can be easily infiltrated thereinto. In addition, electrons can be effectively transferred since titanium dioxide crystals are one-dimensionally arranged. | 09-02-2010 |
20100233523 | HEAT RESISTING ULTRAFINE FIBROUS SEPARATOR AND SECONDARY BATTERY USING THE SAME - A heat-resisting ultrafine fibrous separator of the present invention is prepared by an electrospinning process, formed of ultrafine fibers of heat-resisting polymer resin having a melting point more than 1800 C or not having the melting point, or ultrafine fibers of polymer resin capable of swelling in an electrolyte, together with the ultrafine fibers of heat-resisting polymer resin. Also, polyolefine fine particles providing a shutdown function are dispersed in the heat-resisting resin or the polymer resin capable of swelling in the electrolyte. The heat-resisting ultrafine fibrous separator of the present invention has the shutdown function, low thermal contraction, thermal endurance, excellent ionic conductivity and excellent adhesive property with an electrode, so a battery having excellent cycling characteristics, and having high-energy density and high capacity can be prepared. | 09-16-2010 |
20100304205 | HEAT RESISTING SEPARATOR HAVING ULTRAFINE FIBROUS LAYER AND SECONDARY BATTERY HAVING THE SAME - A polyolefin separator having an heat-resistant ultrafine fibrous layer and a secondary battery using the same, in which the separator has a shutdown function, low thermal contraction characteristics, thermal endurance, excellent ionic conductivity, excellent cycling characteristics at the time of battery construction, and excellent adhesion with an electrode. The present N invention adopts a very simple and easy process to form an ultrafine fibrous layer through an electrospinning process, and at the same time, to remove solvent and to form pores. Accordingly, the separator of the present invention is useful particularly for electrochemical devices used in a hybrid electric automobile, an electric automobile, and a fuel cell automobile, requiring high thermal endurance and thermal stability. | 12-02-2010 |
20100317790 | GRAPHENE COMPOSITE NANOFIBER AND PREPARATION METHOD THEREOF - Disclosed are a graphene composite nanofiber and a preparation method thereof. The graphene composite nanofiber is produced by dispersing graphenes to at least one of a surface and inside of a polymer nanofiber or a carbon nanofiber having a diameter of 1˜1000 nm, and the graphenes include at least one type of monolayer graphenes, and multilayer graphenes having a thickness of 10 nm or less. The graphene composite nanofiber can be applied to various industrial fields, e.g., a light emitting display, a micro resonator, a transistor, a sensor, a transparent electrode, a fuel cell, a solar cell, a secondary cell, and a composite material, owing to a unique structure and property of graphene. | 12-16-2010 |
20110266213 | ULTRAFINE CONTINUOUS FIBROUS CERAMIC FILTER AND METHOD OF MANUFACTURING SAME - An ultrafine continuous fibrous ceramic filter, which comprises a filtering layer of a fibrous porous body, wherein the fibrous porous body comprises continuous ultrafine fibers of metal oxide which are randomly arranged and layered, and powdery nano-alumina incorporated into the ultrafine fibers or coated thereon, the ultrafine fibers being obtained by electrospinning a spinning solution comprising a metal oxide precursor sol-gel solution, and optionally, a polymer resin, and sintering the electrospun fibers, in which the ultrafine fibers have an average diameter of 10˜500 nm, and the fibrous porous body has a pore size of maximum frequency ranging from 0.05 to 2 μm, exhibits high filtration efficiency at a high flow rate, and can be regenerated. | 11-03-2011 |
20110274906 | SILICON CARBIDE NANOFIBER AND FABRICATION METHOD OF SILICON CARBIDE NANOFIBER USING EMULSION SPINNING - Disclosed is: a single crystalline silicon carbide nanofiber having improved thermal and mechanical stability as well as a large specific surface area which is applicable to a system for purifying exhaust gas, silicon carbide fiber filter, diesel particulate filter having a high temperature stability and may be used in the form of nanostructures such as nanorods and nanoparticles. | 11-10-2011 |
20120003524 | METAL OXIDE ULTRAFINE FIBER-BASED COMPOSITE SEPARATOR WITH HEAT RESISTANCE AND SECONDARY BATTERY USING SAME - An ultrafine fiber-based composite separator comprising a fibrous porous body which comprises ultrafine metal oxide/polymer composite fibers, or ultrafine metal oxide fibers and a polymer resin coating layer formed on the surface thereof, the ultrafine fibers being continuously randomly arranged and layered, and obtained by electrospinning a metal oxide precursor sol-gel solution or a mixture of a metal oxide precursor sol-gel solution and a polymer resin solution, wherein the surface of the metal oxide/polymer composite fibers has a uniform mixing composition of the metal oxide and the polymer resin, in which the separator has a heat shrinkage rate at 150˜250° C. of 10% or less and does not break down due to melting at a temperature of 200° C. or lower, has low heat shrinkage rate, and superior heat resistance and ionic conductivity, being capable of providing improved cycle and power properties when used in manufacturing a battery. | 01-05-2012 |
20120042713 | GAS SENSOR USING METAL OXIDE NANOPARTICLES, AND METHOD FOR MANUFACTURING SAME - The present invention provides a gas sensor, including: a sensor substrate provided with an electrode; and a thin layer of sensor material formed by spraying a solution in which metal oxide nanoparticles are dispersed onto the sensor substrate. The gas sensor is advantageous in that a sensor material is formed into a porous thin layer containing metal oxide nanoparticles having a large specific surface area, thus realizing high sensitivity on the ppb scale and a high reaction rate. Further, the gas sensor is advantageous in that it can be manufactured at room temperature, and the thickness of a sensor material can be easily adjusted by adjusting the spray time, so that a thin gas sensor or a thick gas sensor can be easily manufactured. | 02-23-2012 |
20120113565 | ELECTRODE FOR SUPER CAPACITOR HAVING METAL OXIDE DEPOSITED ON ULTRAFINE CARBON FIBER AND THE FABRICATION METHOD THEREOF - The present invention discloses an improved electrode for a supercapacitor and a method of preparation thereof. The inventive electrode comprises a collector, a carbon substrate disposed on the collector comprising ultrafine carbon fibers having a specific surface area of at least 200 m | 05-10-2012 |
20140076797 | FIBER-BASED FILTER WITH NANONET LAYER AND PREPARATION METHOD THEREOF - A fiber-based filter includes a filter-based porous body having a most frequent pore size from 0.1 μm to 2 μm in a pore size distribution, in which a ultra-fine fiber is continuously and randomly disposed, and a filtration layer having a nanonet layer having a most frequent pore size from 1 nm to 100 nm in the pore size distribution, in which an anisotropic nanomaterial is disposed. The fiber-based filter may have excellent filtration efficiency capable of removing even super-fine particles such as virus and heavy metal, and may show high permeation flow rate due to low loss of pressure during the filtration, and may be usefully used as an air and water-treatment filter. | 03-20-2014 |
20140329131 | HEAT RESISTING SEPARATOR HAVING ULTRAFINE FIBROUS LAYER AND SECONDARY BATTERY HAVING THE SAME - A polyolefin separator having an heat-resistant ultrafine fibrous layer and a secondary battery using the same, in which the separator has a shutdown function, low thermal contraction characteristics, thermal endurance, excellent ionic conductivity, excellent cycling characteristics at the time of battery construction, and excellent adhesion with an electrode. The present invention adopts a very simple and easy process to form an ultrafine fibrous layer through an electrospinning process, and at the same time, to remove solvent and to form pores. Accordingly, the separator of the present invention is useful particularly for electrochemical devices used in a hybrid electric automobile, an electric automobile, and a fuel cell automobile, requiring high thermal endurance and thermal stability. | 11-06-2014 |
20150078983 | METHOD OF PREPARING CARBON FIBER FROM WOOD WASTE INCLUDING ADHESIVE - Provided is a method of preparing cellulose fiber and carbon fiber by recycling industrial wood waste, wherein the carbon fiber is prepared by preparing high purity cellulose pulp by using, as a raw material, wood waste generated by manufacturers of pulp, furniture and other industrial products from wood and by eliminating resin and lignin impregnated in the wood waste through pulping and bleaching of the raw material, by preparing cellulose fiber by directly dissolving the prepared pulp in a cellulose solvent, and then by performing stabilizing and carbonizing with the cellulose fiber as a precursor. | 03-19-2015 |