Patent application number | Description | Published |
20090061319 | SILICON THIN FILM ANODE FOR LITHIUM SECONDARY BATTERY AND PREPARATION METHOD THEREOF - Disclosed are a silicon thin film anode for a lithium secondary battery having enhanced cycle characteristics and capacity and a preparation method thereof. A preparation method for a silicon thin film anode for a lithium secondary battery, comprises: preparing a collector including a metal; forming an anode active material layer including a silicon on the collector; forming one or more interface stabilizing layer, by annealing the collector and the anode active material layer under one of an inert atmosphere, a reduced atmosphere, and a vacuum atmosphere to react a metallic component of at least one of the collector and the anode active material layer with a silicon component of the anode active material layer at an interface therebetween; and forming a carbon coating layer on the anode active material layer by performing an annealing process in a hydrocarbon atmosphere. | 03-05-2009 |
20090072780 | Photovoltaic-Charged Secondary Battery System - The present invention provides a photovoltaic-charged secondary battery system, in which an electrode for optical power generation and an electrode for charging and discharging generated electrical energy are integrated into a single cell structure, and the potential difference between the electrodes is systematically controlled, thus maximizing the conversion efficiency of optical energy, maximizing the utilization rate of cell energy, and extending the life span of the battery. | 03-19-2009 |
20090117464 | FABRICATION METHOD FOR ELECTRODE ACTIVE MATERIAL AND LITHIUM BATTERY COMPRISING ELECTRODE ACTIVE MATERIAL FABRICATED THEREFROM - Disclosed is a fabrication method for an electrode active material, and a lithium battery comprising an electrode active material fabricated therefrom. The fabrication method for an electrode active material comprises preparing an aqueous solution by dissolving a precursor that can simultaneously undergo positive ion substitution and surface-reforming processes in water; mixing and dissolving raw materials for an electrode active material with a composition ratio for a final electrode active material in the aqueous solution, thereby preparing a mixed solution; removing a solvent from the mixed solution, thereby forming a solid dry substance; thermal-processing the solid dry substance; and crushing the thermal-processed solid dry substance. | 05-07-2009 |
20100092868 | CARBON NANOTUBE-COATED SILICON/METAL COMPOSITE PARTICLE, PREPARATION METHOD THEREOF, AND ANODE FOR SECONDARY BATTERY AND SECONDARY BATTERY USING THE SAME - Disclosed are a carbon nanotube-coated silicon/metal composite particle, a preparation method thereof, an anode for a secondary battery comprising the carbon nanotube-coated silicon/metal composite particle, and a secondary battery comprising the anode, wherein the carbon nanotube-coated silicon/metal composite particle characterized in comprising: a composite particle of silicon and metal; and a carbon nanotube coated on the surface of the composite particle of silicon and metal, wherein the carbon nanotube-coated silicon/metal composite particle may be prepared by preparing composite particle of silicon and metal, followed by treating the composite particles of silicon and metal with heat under a mixed gas atmosphere of an inert gas and a hydrocarbon gas. | 04-15-2010 |
20100301276 | METHOD OF PREPARING BUNDLE TYPE SILICON NANOROD COMPOSITE THROUGH ELECTROLESS ETCHING PROCESS USING METAL IONS AND ANODE ACTIVE MATERIAL FOR LITHIUM SECONDARY CELLS COMPRISING THE SAME - The present invention relates to a method of preparing a porous silicon nanorod structure composed of columnar bundles having a diameter of 50-100 nm and a length of 2-5 μm, and a lithium secondary cell using the porous silicon nanorod structure as an anode active material. The present invention provides a high-capacity and high-efficiency anode active material for lithium secondary cells, which can overcome the low conductivity of silicon and improve the electrode deterioration attributable to volume expansion because it is prepared by electrodepositing the surface of silicon powder with metal and simultaneously etching the silicon powder partially using hydrofluoric acid. | 12-02-2010 |
20110056824 | METHOD OF PREPARING POSITIVE ACTIVE MATERIAL FOR LITHIUM BATTERY - Disclosed is a method of preparing a positive active material for a lithium battery. The method comprises: depositing a positive active material on an electrode on a substrate (1); and putting metal chips on a metal oxides target and performing a sputtering process, thereby depositing mixed metal-oxides on the positive active material (2). In another aspect, the method comprises: preparing an electrode active material; preparing a precursor solution including the electrode active material; and printing the precursor solution on the substrate, and evaporating a solvent at a temperature of 80-120° C. | 03-10-2011 |
20120068107 | RECOVERY AND SYNTHESIS METHOD FOR METALOXIDIC CATHODIC ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY - Disclosed are a recovery for a metaloxidic cathodic active material for a lithium ion secondary battery and a synthesis thereof by the recovery method, wherein the recovery method includes (a) dissolving a cathodic active material from a waste lithium ion secondary battery using sulfuric acid solution containing sulfurous acid gas to generate a solution containing metal ions, (b) injecting sodium hydroxide solution and ammonia solution in the solution containing the metal ions to fabricate an electrode active material precursor, and (c) filtrating the active material precursor, followed by drying and grinding, thus to fabricate a solid-state cathodic active material precursor, and the synthesis method is achieved by mixing the electrode active material precursor fabricated according to the recovery method with lithium carbonate or lithium hydroxide, followed by heat treatment, to generate a metaloxidic cathodic active material. | 03-22-2012 |
20120202120 | SYNTHESIZING METHOD FOR LITHIUM TITANIUM OXIDE NANOPARTICLE USING SUPERCRITICAL FLUIDS - A method for synthesizing lithium titanium oxide-based anode active material nanoparticles, and more particularly, a method for synthesizing lithium titanium oxide-based anode active material nanoparticles using a supercritical fluid condition is disclosed herein. The method may include (a) preparing a lithium precursor solution and a titanium precursor solution, (b) forming lithium titanium oxide-based anode active material nanoparticles by introducing the lithium precursor solution and titanium precursor solution into an reactor at a supercritical fluid condition, and (c) cleaning and drying the nanoparticles, and may further include (d) calcinating the nanoparticles at 500-1000° C. for 10 minutes to 24 hours after the step (c). | 08-09-2012 |
20120326078 | METHOD OF PREPARING CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERIES AND LITHIUM SECONDARY BATTERIES USING THE SAME - Disclosed is a method for preparing a cathode active material represented by Li | 12-27-2012 |
20130299735 | METHOD OF PRODUCING NANOCOMPOSITE CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY - Disclosed is a method of producing a nanocomposite cathode active material for a lithium secondary battery, represented by the following formula: | 11-14-2013 |
20130302690 | METHOD FOR COATING CARBON ON LITHIUM TITANIUM OXIDE-BASED ANODE ACTIVE MATERIAL NANOPARTICLES AND CARBON-COATED LITHIUM TITANIUM OXIDE-BASED ANODE ACTIVE MATERIAL NANOPARTICLES PRODUCED BY THE METHOD - Disclosed is a method for carbon coating on lithium titanium oxide-based anode active material nanoparticles. The method includes (a) introducing a lithium precursor solution, a titanium precursor solution and a surface modifier solution into a reactor, and reacting the solutions under supercritical fluid conditions to prepare a solution including nanoparticles of an anode active material represented by Li | 11-14-2013 |
20130313485 | METHOD OF FABRICATING LiFePO4 CATHODE ELECTROACTIVE MATERIAL BY RECYCLING, AND LiFePO4 CATHODE ELECTROACTIVE MATERIAL, LiFePO4 CATHODE, AND LITHIUM SECONDARY BATTERY FABRICATED THEREBY - The present invention relates to a method for fabricating a LiFePO4 cathode electroactive material for a lithium secondary battery by recycling, and a LiFePO4 cathode electroactive material for a lithium secondary battery, a LiFePO4 cathode, and a lithium secondary battery fabricated thereby. The present invention is characterized in that a cathode scrap is heat treated in air for a cathode electroactive material to be easily dissolved in an acidic solution, and amorphous FePO | 11-28-2013 |
20140057175 | CATHODE ACTIVE MATERIALS FOR LITHIUM SECONDARY BATTERY AND PREPARATION METHOD THEREOF - Provided is a cathode active material for a lithium secondary battery and a method for preparing the same. The cathode active material for a lithium secondary battery allows a lithium secondary battery to realize high capacity and to maintain maximum capacity even at high voltage, prevents a drop in capacity during repeated charge/discharge cycles, and improves the lifespan of a lithium secondary battery. | 02-27-2014 |
20140099552 | NANOCOMPOSITE CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERIES, METHOD FOR PREPARING THE SAME AND LITHIUM SECONDARY BATTERIES COMPRISING THE SAME - The present disclosure relates to a nanocomposite cathode active material for a lithium secondary battery, a method for preparing same, and a lithium secondary battery including same. More particularly, the present disclosure relates to a nanocomposite cathode active material for a lithium secondary battery including: a core including LiMn | 04-10-2014 |
20140141324 | ELECTROLYTE FOR MAGNESIUM SECONDARY BATTERY AND PREPARATION METHOD THEREOF - Provided are an electrolyte for a magnesium secondary battery having improved ion conductivity and stability, and a method for preparing the same. The electrolyte for a magnesium secondary battery shows higher ion conductivity as compared to the electrolyte according to the related art, increases the dissociation degree of a magnesium halide electrolyte salt, and provides stable electrochemical characteristics. In addition, after determining the capacity, output characteristics and cycle life of the magnesium secondary battery including the electrolyte, the battery provides significantly higher discharge capacity after 100 cycles, as compared to the electrolyte according to the related art. Therefore, the electrolyte may be useful for an electrolyte solution of a magnesium secondary battery. | 05-22-2014 |
20140264185 | RECYCLING METHOD OF OLIVINE-BASED CATHODE MATERIAL FOR LITHIUM SECONDARY BATTERY, CATHODE MATERIAL FABRICATED THEREFROM, AND CATHODE AND LITHIUM SECONDARY BATTERY INCLUDING THE SAME - The present invention relates to a method for recycling LiFePO | 09-18-2014 |
20140349177 | MAGNESIUM HYBRID BATTERY AND ITS FABRICATION METHOD - The present disclosure relates to a magnesium hybrid battery and a method for fabricating same. The magnesium hybrid battery according to the present disclosure, which includes magnesium or magnesium alloy metal as an anode, a cathode including a cathode active material wherein not only magnesium ion but also one or more ion selected from lithium ion and sodium ion can be intercalated and deintercalated and an electrolyte including magnesium ion and further including one or more ion selected from lithium ion and sodium, can overcome the limitation of the existing magnesium secondary battery and provide improved battery capacity, output characteristics, cycle life, safety, etc. | 11-27-2014 |
20140361216 | CATHODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY INCLUDING LITHIUM MANGANESE BORATE COMPOUND AND MANGANESE OXIDE, AND METHOD FOR PRODUCING THE SAME - Disclosed is a cathode active material for a lithium ion secondary battery which includes a lithium manganese borate compound and a manganese oxide. The lithium manganese borate compound contains a larger amount of lithium than conventional lithium manganese borate compounds. Therefore, a larger amount of lithium is deintercalated in a battery including the cathode active material, and as a result, the specific capacity of the battery reaches 100-160 mAh/g, which is much higher than that of conventional lithium ion secondary batteries (<80 mAh/g). Also disclosed is a method for producing the cathode active material. | 12-11-2014 |