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 |