Patent application number | Description | Published |
20090214938 | Non-aqueous electrolyte secondary battery - A non-aqueous electrolyte secondary battery has a positive electrode ( | 08-27-2009 |
20090246632 | Lithium secondary battery and method of manufacturing the same - A lithium secondary battery contains a negative electrode binder containing a polyimide resin having a structure represented by the following chemical formula (1), and the polyimide resin having a molecular weight distribution such that the weight ratio of a polyimide resin having a molecular weight of less than 100,000 and a polyimide resin having a molecular weight from 100,000 to less than 200,000 is from 50:50 to 90:10: | 10-01-2009 |
20100081063 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte secondary battery has a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte dissolving a solute in a non-aqueous solvent wherein the negative electrode contains a negative electrode active material containing powdered silicon and/or silicon alloy and a binding agent, and the non-aqueous electrolyte contains a fluorinated cyclic carbonate represented by a general formula (1) below, and wherein when Li storage volume per unit area in the negative electrode during charging is determined as A and the theoretical maximum Li storage volume per unit area in the negative electrode is determined as B, a utilizing rate (%) of negative electrode as expressed by (A/B)×100 is 45% or less. | 04-01-2010 |
20110076534 | LITHIUM ION SECONDARY BATTERY - A lithium ion secondary battery | 03-31-2011 |
20110217577 | LITHIUM SECONDARY BATTERY - A lithium secondary battery comprises an electrode assembly and a non-aqueous electrolyte. The electrode assembly is made by winding a negative electrode, a positive electrode, and a separator interposed between the negative and positive electrodes. The negative electrode contains a negative electrode active material that is alloyed with lithium. The non-aqueous electrolyte is impregnated in the electrode assembly. At least one of the negative and positive electrodes is divided into a plurality of electrode units which are arranged at spaces for each other along the winding direction. | 09-08-2011 |
20110274986 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND NONAQUEOUS ELECTROLYTIC SOLUTION FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A nonaqueous electrolyte secondary battery includes a positive electrode having a positive-electrode active material, a negative electrode having a negative-electrode active material, and a nonaqueous electrolytic solution having a nonaqueous solvent dissolving a solute. The negative-electrode active material includes powdered silicon and/or a silicon alloy, the nonaqueous electrolytic solution includes additives composed of at least one fluorinated lithium phosphate selected from the group consisting of lithium monofluorophosphate, lithium difluorophosphate, and lithium trifluorophosphate and a diisocyanate compound, and the nonaqueous solvent includes a chain carbonate compound. | 11-10-2011 |
20120129048 | BINDER FOR LITHIUM SECONDARY BATTERY, NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY, LITHIUM SECONDARY BATTERY, BINDER PRECURSOR SOLUTION FOR LITHIUM SECONDARY BATTERY, AND METHOD FOR MANUFACTURING NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY - Provided is a binder capable of realizing a lithium secondary battery that includes a negative electrode including a negative-electrode active material layer containing at least one of silicon and a silicon alloy as a negative-electrode active material and also containing a binder and has an excellent charge-discharge cycle characteristic. The binder for the lithium secondary battery contains a polyimide resin that is formed by imidizing either a tetracarboxylic acid or a tetracarboxylic anhydride and a diamine, the polyimide resin having a hydrolyzable silyl group. | 05-24-2012 |
Patent application number | Description | Published |
20100233550 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte secondary battery has a positive electrode containing a positive electrode active material, a negative electrode, and a non-aqueous electrolyte solution in which an electrolyte is dissolved in a non-aqueous solvent. The positive electrode active material includes a lithium-containing transition metal oxide that releases oxygen during initial charge, and the non-aqueous solvent contains a fluorinated cyclic carbonate in which fluorine atoms are directly bonded to a carbonate ring. | 09-16-2010 |
20100330424 | NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERIES AND LITHIUM SECONDARY BATTERY - A negative electrode ( | 12-30-2010 |
20110117431 | LITHIUM SECONDARY BATTERY AND METHOD OF MANUFACTURING THE SAME - A lithium secondary battery including an electrode assembly and a non-aqueous electrolyte impregnated in the electrode assembly, the electrode assembly containing a positive electrode, a negative electrode having a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector, the negative electrode mixture layer containing a binder and negative electrode active material particles, the negative electrode active material particles containing at least one of silicon and a silicon alloy, and a separator interposed between the negative electrode and the positive electrode. The binder contains a polyimide resin having a branch structure formed by imidizing a polyvalent amine having a valency of 3 or more and a tetracarboxylic dianhydride. | 05-19-2011 |
20110200887 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte secondary battery includes a positive electrode ( | 08-18-2011 |
20110206981 | LITHIUM SECONDARY BATTERY - A lithium secondary battery includes a positive electrode in which a positive electrode mixture layer including a positive electrode binder and a positive electrode active material containing particles of a lithium transition metal composite oxide represented by a chemical formula Li | 08-25-2011 |
20120082892 | LITHIUM SECONDARY BATTERY - A lithium secondary battery has a positive electrode, a separator, and a negative electrode having a negative electrode current collector and a negative electrode mixture layer formed on a surface of the negative electrode current collector. The negative electrode mixture layer contains a negative electrode active material including a metal element capable of alloying with lithium. The negative electrode current collector includes a substrate made of a Cu—Fe—P alloy foil, and a surface layer provided on both surfaces of the substrate and made of pure copper. The surface layer has a Vickers hardness of 120 and less than that of the substrate. The negative electrode current collector has a proof stress of 308 MPa. | 04-05-2012 |
Patent application number | Description | Published |
20090081556 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode and a non-aqueous electrolyte. The negative electrode comprises a negative electrode active material to be alloyed with lithium and the non-aqueous electrolyte comprises a non-aqueous solvent containing fluorinated cyclic carbonate and propyl acetate. | 03-26-2009 |
20090087731 | Lithium secondary battery - A lithium secondary battery includes: a positive electrode having a positive electrode active material layer disposed on a positive electrode current collector, the positive electrode active material layer containing a positive electrode binder and a positive electrode active material containing a layered lithium-transition metal composite oxide; a negative electrode having a negative electrode current collector and a negative electrode active material layer disposed on the negative electrode current collector, the negative electrode active material layer containing a negative electrode binder and a negative electrode active material containing particles of silicon and/or a silicon alloy; and a non-aqueous electrolyte. Al | 04-02-2009 |
20100266902 | NEGATIVE ELECTRODE MATERIAL FOR RECHARGEABLE BATTERY WITH NONAQUEOUS ELECTROLYTE, NEGATIVE ELECTRODE FOR RECHARGEABLE BATTERY WITH NONAQUEOUS ELECTROLYTE, RECHARGEABLE BATTERY WITH NONAQUEOUS ELECTROLYTE, AND PROCESS FOR PRODUCING POLYCRYSTALLINE SILICON PARTICLES FOR ACTIVE MATERIAL FOR NEGATIVE ELECTRODE MATERIAL FOR RECHARGEABLE BATTERY WITH NONAQUEOUS ELECTROLYTE - This invention provides a negative electrode material for a rechargeable battery with a nonaqueous electrolyte, characterized in that the negative electrode material contains polycrystalline silicon particles as an active material, the particle diameter of crystallites of the polycrystalline silicon is not less than 20 nm and not more than 100 nm in terms of a crystallite size determined by the Scherrer method from the full width at half maximum of a diffraction line attributable to Si (111) around 2θ=28.4° in an x-ray diffraction pattern analysis, and the true specific gravity of the silicon particles is 2.300 to 2.320. | 10-21-2010 |
20150044535 | LITHIUM SECONDARY BATTERY - A lithium secondary battery which is unlikely to be deformed during charging and discharging. A lithium secondary battery includes a spiral-shaped electrode assembly and a cylindrical battery container. The battery container receives the electrode assembly. The electrode assembly includes a negative electrode, a positive electrode, and a separator. The negative electrode includes a negative electrode collector and a negative electrode active material layer. The negative electrode active material layer is disposed on the negative electrode collector. The negative electrode active material layer contains a negative electrode active material forming an alloy with lithium. The positive electrode faces the negative electrode. The separator is disposed between the negative electrode and the positive electrode. When A is a proof stress of the negative electrode collector multiplied by the thickness thereof and a capacity to be charged per unit area of the negative electrode is represented by B, A≧0.075×B−3 is satisfied. | 02-12-2015 |