Patent application number | Description | Published |
20120319201 | SEMICONDUCTOR DEVICES HAVING VERTICAL DEVICE AND NON-VERTICAL DEVICE AND METHODS OF FORMING THE SAME - In a semiconductor device, a vertical transistor comprises: a first diffusion region on a substrate; a channel region on the first diffusion region and extending in a vertical direction; a second diffusion region on the channel region; and a gate electrode at a sidewall of, and insulated from, the channel region. A horizontal transistor is positioned on the substrate, the horizontal transistor comprising: a first diffusion region and a second diffusion region on the substrate and spaced apart from each other; a channel region on the substrate between the first diffusion region and the second diffusion region; and a gate electrode on the channel region and isolated from the channel region. A portion of a gate electrode of the vertical transistor and a portion of the gate electrode of the horizontal transistor are at a same vertical position in the vertical direction relative to the substrate. | 12-20-2012 |
20130140612 | FIELD-EFFECT TRANSISTOR HAVING BACK GATE AND METHOD OF FABRICATING THE SAME - A back-bias region is disposed on a substrate. A buried insulating layer covers the substrate and the back-bias region. A body is formed on the buried insulating layer and partially overlaps the back-bias region. A drain is in contact with the body. A gate electrode covers top and lateral surfaces of the body. | 06-06-2013 |
20130171810 | METHODS OF FABRICATING SEMICONDUCTOR DEVICE USING HIGH-K LAYER FOR SPACER ETCH STOP AND RELATED DEVICES - Methods of fabricating a semiconductor device, and related devices, include forming a gate electrode on a substrate, forming a first buffer layer, a second buffer layer and a third buffer layer on side surfaces of the gate electrode and on the substrate near the gate electrode, forming a spacer covering the side surfaces of the gate electrode on the third buffer layer, the third buffer layer on the substrate being exposed, exposing the second buffer layer on the substrate by removing the exposed third buffer layer, exposing the first buffer layer on the substrate by removing the exposed second buffer layer, forming deep junction in the substrate using the spacer as a mask, and removing the spacer. The third buffer layer is a material layer having a higher dielectric constant than the second buffer layer. The spacer includes a material layer different than the third, second and first buffer layers. | 07-04-2013 |
20130178048 | METHOD OF FABRICATING SEMICONDUCTOR DEVICE HAVING BURIED WIRING AND RELATED DEVICE - According to example embodiments of inventive concepts, a method of fabricating a semiconductor device includes forming a sacrificial pattern having SiGe on a crystalline silicon substrate. A body having crystalline silicon is formed on the sacrificial pattern. At least one active element is formed on the body. An insulating layer is formed to cover the sacrificial pattern, the body, and the active element. A contact hole is formed to expose the sacrificial pattern through the insulating layer. A void space is formed by removing the sacrificial pattern. An amorphous silicon layer is formed in the contact hole and the void space. The amorphous silicon layer is transformed into a metal silicide layer. | 07-11-2013 |
20140097502 | SEMICONDUCTOR DEVICE AND FABRICATING METHOD THEREOF - A semiconductor device has gate-all-around devices formed in respective regions on a substrate. The gate-all-around devices have nanowires at different levels. The threshold voltage of a gate-all-around device in first region is based on a thickness of an active layer in an adjacent second region. The active layer in the second region may be at substantially a same level as the nanowire in the first region. Thus, the nanowire in the first region may have a thickness based on the thickness of the active layer in the second region, or the thicknesses may be different. When more than one active layer is included, nanowires in different ones of the regions may be disposed at different heights and/or may have different thicknesses. | 04-10-2014 |
20140099793 | SEMICONDUCTOR DEVICE AND METHOD FOR FABRICATING THE SAME - A method for fabricating a semiconductor device includes forming a first mask on a substrate, forming a first side wall of a fin by performing a first etching of the substrate using the first mask, forming a second mask on the substrate, the second mask being different from the first mask, and forming a second side wall of the fin by performing a second etching of the substrate using the second mask. | 04-10-2014 |
20150303202 | SEMICONDUCTOR DEVICES HAVING VERTICAL DEVICE AND NON-VERTICAL DEVICE AND METHODS OF FORMING THE SAME - A semiconductor device comprises a substrate extending in a horizontal direction and a vertical transistor on the substrate. The vertical transistor comprises: a first diffusion region on the substrate; a channel region on the first diffusion region and extending in a vertical direction relative to the horizontal direction of the extension of the substrate; a second diffusion region on the channel region; and a gate electrode at a sidewall of, and insulated from, the channel region. A horizontal transistor is positioned on the substrate, the horizontal transistor comprising: a first diffusion region and a second diffusion region on the substrate and spaced apart from each other; a channel region on the substrate between the first diffusion region and the second diffusion region; and a gate electrode on the channel region and isolated from the channel region. A portion of a gate electrode of the vertical transistor and a portion of the gate electrode of the horizontal transistor are at a same vertical position in the vertical direction relative to the substrate. | 10-22-2015 |
20160099330 | SEMICONDUCTOR DEVICE WITH NANOWIRES IN DIFFERENT REGIONS AT DIFFERENT HEIGHTS - A semiconductor device has gate-all-around devices formed in respective regions on a substrate. The gate-all-around devices have nanowires at different levels. The threshold voltage of a gate-all-around device in first region is based on a thickness of an active layer in an adjacent second region. The active layer in the second region may be at substantially a same level as the nanowire in the first region. Thus, the nanowire in the first region may have a thickness based on the thickness of the active layer in the second region, or the thicknesses may be different. When more than one active layer is included, nanowires in different ones of the regions may be disposed at different heights and/or may have different thicknesses. | 04-07-2016 |
Patent application number | Description | Published |
20080219911 | Process Of Precipitation for Spheric Manganese Carbonate and the Products Produced Thereby - Disclosed herein are a manganese carbonate useful as a material for spinel-type LiMn | 09-11-2008 |
20090068561 | POSITIVE ACTIVE MATERIAL FOR LITHIUM BATTERY, METHOD OF PREPARING THE SAME, AND LITHIUM BATTERY INCLUDING THE SAME - A positive active material according to one embodiment of the present invention includes an internal bulk part and an external bulk part surrounding the internal bulk part and has a continuous concentration gradient of the metal composition from an interface between the internal bulk part and the external bulk part to the surface of the active material. The provided positive active material in which the metal composition is distributed in a continuous concentration gradient has excellent electrochemical characteristics such as a cycle life, capacity, and thermal stability. | 03-12-2009 |
20090087362 | Cathode Active Material Coated With Fluorine Compound for Lithium Secondary Batteries and Method for Preparing the Same - Disclosed herein is a cathode active material coated with a fluorine compound for lithium secondary batteries. The cathode active material is structurally stable, and improves the charge-discharge characteristics, cycle characteristics, high-voltage characteristics, high-rate characteristics and thermal stability of batteries. | 04-02-2009 |
20090253042 | METHOD OF PREPARING POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY PREPARED BY SAME, AND RECHARGEABLE LITHIUM BATTERY INCLUDING POSITIVE ACTIVE MATERIAL - The present invention relates to a method of preparing a positive active material for a rechargeable lithium battery, a positive active material prepared according to the method, and a rechargeable lithium battery including the same. This manufacturing method includes preparing a complex salt solution by mixing a solution including a metal source material and a chelating agent, disposing the complex salt on the surface of a lithium-included compound by adding a lithium-included compound to the complex salt solution, adding a solution including a fluorine source material to the solution including a lithium-included compound with the complex salt on the surface, and heat-treating the mixture. The present invention provides a simple method of economically preparing a positive active material in which structural transition on the surface is prevented and securing a uniform coating layer. In addition, the positive active material can have improved charge and discharge characteristics, cycle life characteristic, and rate characteristic. It also has improved ion conductivity, and accordingly can improve mobility of lithium ions in an electrolyte and thereby improve discharge potential of a battery. Furthermore, the positive active material can decrease the amount of a conductive material and increase density of a substrate. | 10-08-2009 |
20090272939 | CORE-SHELL SPINEL CATHODE ACTIVE MATERIALS FOR LITHIUM SECONDARY BATTERIES, LITHIUM SECONDARY BATTERIES USING THE SAME AND METHOD FOR PREPARING THEREOF - Disclosed herein is a core-shell spinel cathode active material for lithium secondary batteries. The core portion of the active material is made of a spinel manganese-containing material substituted with fluorine or sulfur, having 4V-grade potential and showing low-cost and high-output characteristics, and the shell portion, which comes into contact with an electrolyte, is made of a spinel transition metal-containing material, having excellent thermal stability and cycle life characteristics and showing low reactivity with the electrolyte. Thus, the cathode active material shows significantly improved cycle life characteristics and excellent thermal stability. | 11-05-2009 |
20100151331 | Positive active material and rechargeable lithium battery comprising same - The present invention relates to a positive active material for a rechargeable lithium battery and a rechargeable lithium battery including the same. The positive active material includes an active compound that can intercalate/deintercalate lithium ions, and a bismuth (Bi)-based compound on the surface of the active compound. The bismuth (Bi)-based compound in the positive active material of the present invention decreases resistance against acid generated around a positive active material, and plays a role of suppressing structural change of the positive active material and its reaction with an electrolyte solution and preventing dissolution of transition elements therein. Accordingly, the positive active material of the present invention can improve storage and cycle life characteristics at a high temperature. In addition, it can increase charge and discharge, cycle life, and rate characteristics of a rechargeable lithium battery as well as improve mobility of lithium ions in the electrolyte solution. | 06-17-2010 |
20110027651 | OLIVINE-TYPE CATHODE ACTIVE MATERIAL PRECURSOR FOR LITHIUM BATTERY, OLIVINE-TYPE CATHODE ACTIVE MATERIAL FOR LITHIUM BATTERY, METHOD FOR PREPARING THE SAME AND LITHIUM BATTERY WITH THE SAME - The present invention provides an olivine-type positive active material precursor for a lithium battery that includes MXO | 02-03-2011 |
20110269025 | METHOD FOR PRODUCING CRYSTALLINE TITANIUM DIOXIDE, METHOD FOR PRODUCING A NEGATIVE ELECTRODE ACTIVE MATERIAL, NEGATIVE ELECTRODE ACTIVE MATERIAL, AND LITHIUM SECONDARY BATTERY - A method of manufacturing crystalline titanium dioxide (TiO | 11-03-2011 |
20130089796 | LITHIUM AIR BATTERY - Disclosed is a lithium air battery that includes a positive electrode including a current collector and a positive active material layer disposed on the current collector and including a positive active material, a negative electrode including a negative active material, and an electrolyte, wherein the positive active material includes lithium peroxide (Li | 04-11-2013 |
20130115519 | SEPARATOR FOR LITHIUM SECONDARY BATTERY AND METHOD FOR MANUFACTURING SAME - Provided is a separator for a rechargeable lithium battery including a porous support including a polymer derived from polyamic acid or a polymer derived from polyimide, wherein the polyamic acid and the polyimide include a repeating unit prepared from aromatic diamine including at least one ortho-positioned functional group relative to an amine group and dianhydride. | 05-09-2013 |
20130183585 | POSITIVE ACTIVE MATERIAL PRECURSOR FOR RECHARGEABLE LITHIUM BATTERY, METHOD OF PREPARING POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY USING THE SAME, AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE PREPARED POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY - Provided are a positive active material precursor for a rechargeable lithium battery including a metal oxide represented by Chemical Formula 1, a positive active material for a rechargeable lithium battery that is obtained by using the positive active material precursor for a rechargeable lithium battery and includes a compound represented by a Chemical Formula 2, and a rechargeable lithium battery including the positive active material for a rechargeable lithium battery. | 07-18-2013 |
20130230783 | LI-AIR BATTERIES HAVING ETHER-BASED ELECTROLYTES - A lithium-air battery includes a cathode including a porous active carbon material, a separator, an anode including lithium, and an electrolyte including a lithium salt and polyalkylene glycol ether, where the porous active carbon material is free of a metal-based catalyst. | 09-05-2013 |
20130266868 | METHOD OF PREPARING POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY PREPARED BY USING THE METHOD, AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE SAME - Provided are a method of preparing a positive active material for a rechargeable lithium battery that includes: forming a positive active material for a rechargeable lithium battery precursor by mixing at least one of a nickel source, a cobalt source, and a manganese source with a carbon source and a solvent; and mixing the active material precursor for a rechargeable lithium battery and a lithium source followed by heat treatment, a positive active material for a rechargeable lithium battery prepared in the method, and a rechargeable lithium battery including the same. | 10-10-2013 |
20130337327 | CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR MANUFACTURING SAME, AND LITHIUM SECONDARY BATTERY INCLUDING SAME - The present invention relates to a cathode active material for a lithium secondary battery comprising: a core including a compound represented by chemical formula 1, and a shell including a compound represented by chemical formula 2, wherein the material composition of the core and the material composition of the shell are different; and a lithium secondary battery including the cathode active material for a lithium secondary battery. | 12-19-2013 |
20140027670 | ANODE ACTIVE MATERIAL WITH WHOLE PARTICLE CONCENTRATION GRADIENT FOR LITHIUM SECONDARY BATTERY, METHOD FOR PREPARING SAME, AND LITHIUM SECONDARY BATTERY HAVING SAME - The present invention relates to a cathode active material with whole particle concentration gradient for a lithium secondary battery, a method for preparing same, and a lithium secondary battery having same, and more specifically, to a composite cathode active material, a method for manufacturing same, and a lithium secondary battery having same, the composite cathode active material having excellent lifetime characteristics and charge/discharge characteristics through the stabilization of crystal structure as the concentration of a metal comprising the cathode active material shows concentration gradient in the whole particle, and having thermostability even in high temperatures. | 01-30-2014 |
20140127575 | POSITIVE ACTIVE MATERIAL FOR LITHIUM SULFUR BATTERY AND LITHIUM SULFUR BATTERY COMPRISING SAME - The present invention relates to a positive active material for a lithium sulfur battery and a lithium sulfur battery comprising the same, and the positive active material for a lithium sulfur battery comprises a core comprising Li | 05-08-2014 |
20140127596 | LITHIUM-AIR BATTERY - The present invention relates to a lithium-air battery, and more particularly, to a lithium-air battery which comprises a gas diffusion-type positive electrode formed in a portion thereof contacting air, and which employs a low-volatility electrolyte, thus exhibiting the effect of preventing volatilization of the electrolyte, thereby enabling the battery to be used over a long period of time without safety problems and without degradation of the charging/discharging characteristics of the battery, and the effect of air flowing into the battery being provided in a quicker and more uniform manner while passing through the gas diffusion-type positive electrode, thus improving the performance of the battery. | 05-08-2014 |
20140131616 | ANODE ACTIVE MATERIAL WITH WHOLE PARTICLE CONCENTRATION GRADIENT FOR LITHIUM SECONDARY BATTERY, METHOD FOR PERPARING SAME, AND LITHIUM SECONDARY BATTERY HAVING SAME - The present invention relates to a cathode active material, method for preparing same, and a lithium secondary battery having same, and more specifically, to a composite cathode active material, a method for preparing same, and a lithium secondary battery having same, the composite cathode active material having excellent lifespan characteristics and charge/discharge characteristics due to the stabilization of crystal structure, and thermostability even in high temperatures. | 05-15-2014 |
20140158932 | POSITIVE ELECTRODE ACTIVE MATERIAL PRECURSOR FOR LITHIUM SECONDARY BATTERY, POSITIVE ELECTRODE ACTIVE MATERIAL MANUFACTURED BY USING THEREOF, AND LITHIUM SECONDARY BATTERY INCLUDING SAME - The present disclosure relates to a positive electrode active material precursor for a lithium secondary battery, a positive electrode active material manufactured by using thereof, and a lithium secondary battery comprising the same. More specifically, it relates to a positive electrode active material precursor for a lithium secondary battery as a secondary particle comprising transition metals, and formed by gathering of a plurality of primary particles having different a-axis direction length to c-axis direction length ratio, wherein the a-axis direction length to c-axis direction length ratio of the primary particle making up the secondary particle is increased from the center to the surface of the secondary particle; a positive electrode active material; and a lithium secondary battery comprising the same. | 06-12-2014 |
20140356713 | CATHODE ACTIVE MATERIAL WITH WHOLE PARTICLE CONCENTRATION GRADIENT FOR LITHIUM SECONDARY BATTERY, METHOD FOR PREPARING THE SAME, AND LITHIUM SECONDARY BATTERY HAVING THE SAME - The present invention relates to an anode active material with whole particle concentration gradient for a lithium secondary battery, a method for preparing same, and a lithium secondary battery having same, and more specifically, to a composite anode active material, a method for manufacturing same, and a lithium secondary battery having same, the composite anode active material having excellent lifetime characteristics and charge/discharge characteristics through the stabilization of crystal structure as the concentration of a metal comprising the anode active material shows concentration gradient in the whole particle, and having thermostability even in high temperatures. | 12-04-2014 |
20150041710 | 3V CLASS SPINEL COMPLEX OXIDES AS CATHODE ACTIVE MATERIALS FOR LITHIUM SECONDARY BATTERIES, METHOD FOR PREPARING THE SAME BY CARBONATE COPRECIPITATION, AND LITHIUM SECONDARY BATTERIES USING THE SAME - Disclosed herein is a 3V class spinel oxide with improved high-rate characteristics which has the composition Li | 02-12-2015 |
20150053890 | METHOD OF PREPARING CATHODE ACTIVE MATERIAL PRECURSOR FOR LITHIUM RECHARGEABLE BATTERY, CATHODE ACTIVE MATERIAL PRECURSOR FOR LITHIUM RECHARGEABLE BATTERY PREPARED THEREBY, AND CATHODE ACTIVE MATERIAL FORMED USING THE CATHODE ACTIVE MATERIAL PRECURSOR - The present invention relates to a method of preparing a cathode active material precursor for a lithium rechargeable battery, the cathode active material precursor for the lithium rechargeable battery prepared thereby, and a cathode active material formed using the cathode active material precursor. | 02-26-2015 |
20150140420 | METHOD FOR MANUFACTURING CARBON-SULFUR COMPOSITE, CARBON-SULFUR COMPOSITE MANUFACTURED THEREBY, AND ELECTROCHEMICAL DEVICE INCLUDING THE SAME - The present invention relates to a method for manufacturing a carbon-sulfur composite, a carbon-sulfur composite manufactured by the method, and an electrochemical device including the same. Since the carbon-sulfur composite manufactured by the carbon-sulfur composite manufacturing method of the present invention includes the hollow carbon ball having the inner hollow which is uniformly filled with sulfur, a sulfur content increases to increase a capacity characteristic increases. In addition, even though sulfur is changed into a liquid state during charge and discharge processes, an electrode structure is not destroyed to realize a stable lifetime characteristic. | 05-21-2015 |
20150318576 | RECHARGEABLE BATTERY COMPRISING NON-AQUEOUS ELECTROLYTIC SOLUTION USING ALKYL METHANESULFONATE AS SOLVENT FOR DISSOLVING ELECTROLYTIC SALT - The present invention relates to a rechargeable battery comprising a non-aqueous electrolytic solution using an alkyl methanesulfonate as a solvent for dissolving the electrolytic salt, and can improve the life characteristics of the battery at high temperature and the high-temperature performance. | 11-05-2015 |
20150333325 | MANUFACTURING METHOD OF POSITIVE ACTIVE MATERIAL PRECURSOR FOR SODIUM RECHARGEABLE BATTERIES, POSITIVE ACTIVE MATERIAL PRECURSOR FOR SODIUM RECHARGEABLE BATTERIES MADE BY THE SAME, AND MANUFACTURING METHOD OF POSITIVE ACTIVE MATERIAL FOR SODIUM RECHARGEABLE BATTERIES, POSITIVE ACTIVE MATERIAL FOR SODIUM RECHARGEABLE BATTERIES MADE BY THE SAME - Disclosed is a method for producing a cathode active material precursor for a sodium secondary battery by using a coprecipitation technique and a cathode active material precursor for a sodium secondary battery produced thereby, and a cathode active material for a sodium secondary battery using the cathode active material precursor for a sodium secondary battery and a method for producing the same. | 11-19-2015 |
20150333385 | METHOD FOR MANUFACTURING A LITHIATED METAL-CARBON COMPOSITE ELECTRODE, LITHIATED METAL-CARBON COMPOSITE ELECTRODE MANUFACTURED THEREBY, AND ELECTROCHEMICAL DEVICE INCLUDING THE ELECTRODE - The present invention relates to a method for manufacturing a lithiated metal-carbon composite electrode, a lithiated metal-carbon composite electrode manufactured thereby, and an electrochemical device including the electrode. More particularly, the present invention relates to a method for manufacturing a lithiated metal-carbon composite electrode with a new structure having excellent charge/discharge and cycle characteristics, a lithiated metal-carbon composite electrode manufactured thereby, and an electrochemical device including the electrode. In the lithiated metal-carbon composite electrode, lithium is alloyed with a metal and is inserted into a crystal structure of carbon to form the composite having a stable structure. Thus, a volume of the metal is slightly varied, so a cycle characteristic may not be deteriorated and charge/discharge capacities may be improved. The lithiated metal-carbon composite electrode may control an irreversible capacity during initial charging/discharging and may be substituted for an unsafe lithium metal anode. | 11-19-2015 |
20150340686 | CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY - The present disclosure relates to a cathode active material for a lithium secondary battery, and more particularly, to a cathode active material, which is used for a lithium secondary battery and is prepared to include a mixture of particles with different particle sizes and thereby to have an improved tap density. At least one particle of the mixture of the particles is provided to have a gradient in internal concentration. | 11-26-2015 |
20150357638 | CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR MANUFACTURING THE SAME, AND LITHIUM SECONDARY BATTERY USING THE SAME - The present invention provides a cathode active material on which at least one coating layer is formed, a method for manufacturing the same, and a lithium secondary battery including the same. According to the present invention, since the coating layer with high electrical conductivity is formed on a surface of the cathode active material, the electrical conductivity is improved to enhance charge/discharge and cycle life characteristics and thermal stability of the battery. | 12-10-2015 |
20160006025 | CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY - The present invention relates to cathode active material for a lithium secondary battery, and more specifically to cathode active material for a lithium secondary battery in which the concentration of the transition metal changes gradually in accordance with particle growth, thus changing the oxidation number of the transition metal and improving the stability of the crystalline structure, and thereby notably improving the high-rate charging and discharging characteristics. | 01-07-2016 |
20160049647 | POSITIVE ELECTRODE ACTIVE MATERIAL PRECURSOR FOR LITHIUM SECONDARY BATTERY, POSITIVE ELECTRODE ACTIVE MATERIAL MANUFACTURED BY USING THEREOF, AND LITHIUM SECONDARY BATTERY INCLUDING THE SAME - Positive electrode active materials are provided. The positive electrode active materials includes a primary particle formed of a plurality of metals including a first metal and a secondary particle formed of at least one of the primary particle. The secondary particle includes a core part, a shell part, a seed region where the primary particle having concentration gradient of the first metal is disposed and a maintain region where the primary particle having constant concentration of the first metal is disposed, the seed region adjacent to the core part and a maintain region adjacent to the sell part, and length of the seed region in a direction from the core part to the shell part is 1 μm. | 02-18-2016 |
20160049648 | POSITIVE ELECTRODE ACTIVE MATERIAL AND SECONDARY BATTERY COMPRISING THE SAME - In the positive electrode active material according to the inventive concept, the amount of residual lithium is decreased although the concentration of nickel is high, and thus the positive electrode active material exhibits excellent cycle-life characteristics and charge and discharge characteristics, has a stabilized crystal structure while having a high capacity, and is structurally stabilized even when being used at a high voltage. In the positive electrode active material, a shell portion in which the concentration of nickel is controlled and the concentrations of other metals are constant is formed on the surface of a core portion having gradients of concentrations of nickel, manganese, and cobalt. Thus, the positive electrode active material exhibits excellent cycle-life characteristics and charge and discharge characteristics, has a stabilized crystal structure while having a high capacity, and is structurally stabilized even when being used at a high voltage. | 02-18-2016 |
20160049649 | POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY - The inventive concepts relate to a positive electrode active material for lithium secondary battery, and more particularly, relate to a positive electrode active material which includes a first concentration gradient portion, a second concentration gradient portion, and a first concentration maintained portion. The first and second concentration gradient portions have gradients of concentrations of nickel, manganese, and cobalt in the direction from the center to the surface, and the first concentration maintained portion has constant concentrations of nickel, manganese, and cobalt between the first concentration gradient portion and the second concentration gradient portion. | 02-18-2016 |
20160049650 | POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY - Embodiments of the inventive concepts described herein relate to a positive electrode active material for lithium secondary battery, and more particularly, relate to a positive electrode active material for a lithium secondary battery having a new structure which includes a core portion having gradients of concentrations of nickel, manganese, and cobalt in a direction from a center to a surface and in which each of the concentration gradients of nickel, manganese, and cobalt has at least one vertex in the core portion. | 02-18-2016 |
20160079595 | METHOD OF MANUFACTURING CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY MANUFACTURED USING THE SAME - The present disclosure relates to a method of manufacturing cathode active material for lithium secondary batteries and a lithium secondary battery manufactured using the same. Methods of manufacturing cathode active material for lithium secondary batteries according to embodiments of the inventive concept can fabricate cathode active material with improved stability and capacity by adjusting temperature of thermal treatment in accordance with concentration of transition metal which shows concentration gradient. | 03-17-2016 |
20160111698 | SEPARATOR FOR LITHIUM SECONDARY BATTERY AND METHOD FOR MANUFACTURING SAME - Provided is a separator for a rechargeable lithium battery including a porous support including a polymer derived from polyamic acid or a polymer derived from polyimide, wherein the polyamic acid and the polyimide include a repeating unit prepared from aromatic diamine including at least one ortho-positioned functional group relative to an amine group and dianhydride. | 04-21-2016 |