Patent application number | Description | Published |
20080226816 | Method of manufacturing an electrode active material particle for a rechargeable battery - A method of manufacturing an electrode active material particle for a rechargeable battery wherein a layer of an active material capable of being alloyed with Li is formed on a surface of a metal particle incapable of being alloyed with Li and then a heat treatment is conducted to diffuse the active material into the metal particle so that the resulting active material particle has a concentration profile in which a concentration of a metal element of the metal particle decreases from an interior toward the surface. | 09-18-2008 |
20080261115 | Non-aqueous electrolyte secondary battery and positive electrode - A non-aqueous electrolyte secondary battery includes a positive electrode having a positive electrode mixture, a negative electrode, and a non-aqueous electrolyte. The positive electrode mixture contains as a positive electrode active material Li | 10-23-2008 |
20080292959 | Positive Electrode and Non-Aqueous Electrolyte Secondary Battery Using the Same - An object of the invention is to provide a positive electrode of an inexpensive material capable of sufficiently storing and releasing ions, and another object is to provide an inexpensive non-aqueous electrolyte secondary battery that allows reversible charge and discharge to be carried out. The positive electrode according to the invention includes an oxide containing potassium and manganese, and the non-aqueous electrolyte secondary battery according to the invention includes a positive electrode, a negative electrode, and a non-aqueous electrolyte containing potassium ions. The positive electrode includes an oxide containing potassium and manganese. | 11-27-2008 |
20080299463 | Nonaqueous Electrolyte Secondary Battery - A nonaqueous electrolyte secondary battery that even at high-rate discharge wherein discharge is carried out at relatively large current, can attain an increase of discharge capacity. There is provided a nonaqueous electrolyte secondary battery comprising positive electrode ( | 12-04-2008 |
20090011335 | Positive electrode active material, method of manufacturing the positive electrode active material, and non-aqueous electrolyte secondary battery - A high-capacity positive electrode active material is provided that enables a non-aqueous electrolyte secondary battery to have excellent load characteristics and high initial charge-discharge efficiency. A non-aqueous electrolyte secondary battery has a positive electrode, a negative electrode, and a non-aqueous electrolyte, and performs charge and discharge by transferring lithium ions between the positive electrode and the negative electrode. The positive electrode has a positive electrode mixture and a positive electrode current collector. The positive electrode mixture contains a positive electrode active material, a conductive agent, and a binder agent (binder). The positive electrode active material includes Li | 01-08-2009 |
20090011336 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, POSITIVE ELECTRODE ACTIVE MATERIAL AND METHOD OF MANUFACTURING THE SAME - As a positive electrode active material, a lithium transition metal complex oxide having a layered rock-salt structure containing lithium (Li) and containing magnesium atoms (Mg) substituted for part of lithium atoms (Li) is used. The lithium transition metal complex oxide is formed by chemical or electrochemical substitution of Mg atoms for part of Li atoms in LiCoO | 01-08-2009 |
20090053613 | Positive Electrode and Non-Aqueous Electrolyte Secondary Battery - A material (hereinafter referred to as “positive electrode material”) including sodium manganate powder as a positive electrode active material, carbon black powder as a conductive agent, and polytetrafluoroethylene as a binder is prepared. The positive electrode material is mixed in an N-methylpyrrolidone solution to produce slurry as a positive electrode mixture. A working electrode is produced by applying the slurry on a positive electrode collector. A negative electrode containing tin or germanium is produced. The non-aqueous electrolyte is produced by adding sodium hexafluorophosphate as an electrolyte salt in a non-aqueous solvent produced by mixing ethylenecarbonate and diethyl carbonate. | 02-26-2009 |
20090061311 | Non-aqueous electrolyte secondary battery - An object of the invention is to provide a non-aqueous electrolyte secondary battery that allows a good charge/discharge cycle characteristic to be obtained. The non-aqueous electrolyte secondary battery according to the invention includes a negative electrode containing silicon as a negative electrode active material, a positive electrode, and a non-aqueous electrolyte, the average particle size of the negative electrode active material is not less than 5 μm nor more than 20 μm, and the weight of the negative electrode active material is at least 10% of the weight of the non-aqueous electrolyte. | 03-05-2009 |
20100009254 | Non-Aqueous Electrolyte Secondary Battery - An object of the invention is to provide an inexpensive non-aqueous electrolyte secondary battery that allows reversible charge and discharge to be carried out and can be used for a long period because of a stable non-aqueous electrolyte used therein. The invention provides a non-aqueous electrolyte secondary battery including a positive electrode including a positive electrode active material and capable of storing and releasing sodium, a negative electrode capable of storing and releasing sodium, and a non-aqueous electrolyte, and the positive electrode active material includes sodium, nickel, manganese, and a transition metal that can exist in a hexavalent state. An example of the transition metal that can exist in a hexavalent state may include tungsten (W). An example of the negative electrode may include a sodium metal capable of storing and releasing sodium ions. | 01-14-2010 |
20100015532 | NEGATIVE ELECTRODE AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY USING THE SAME - A rolled foil of surface roughened copper as thick as 26 μm for example having a surface formed into an irregular shape with copper precipitated thereon by an electrolytic method is prepared as a negative electrode collector. Tin (Sn) or germanium (Ge) is deposited on the rolled foil described above, so that a negative electrode active material layer is formed. Note that the deposited tin or germanium is amorphous. The arithmetic mean roughness Ra in the surface-roughened rolled foil described above is preferably not less than 0.1 μm nor more than 10 μm. A non-aqueous electrolyte is produced by adding sodium hexafluorophosphate as an electrolyte salt in a concentration of 1 mol/l to a non-aqueous solvent produced by mixing ethylene carbonate and diethyl carbonate in the ratio of 50:50 by volume. | 01-21-2010 |
20100104944 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD OF MANUFACTURING THE SAME - A mixed positive electrode active material is used. The mixed positive electrode active material is obtained by mixing a layered oxide whose initial charge-discharge efficiency when lithium metal is used for a counter electrode is less than 100% (hereinafter referred to as a first layered oxide) and a layered oxide whose initial charge-discharge efficiency is 100% or more (hereinafter referred to as a second layered oxide). Examples of the first layered oxide include Li | 04-29-2010 |
20100129715 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A positive electrode active material is made of sodium containing oxide. The sodium containing oxide contains Na | 05-27-2010 |
20100173202 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD OF FORMING POSITIVE ELECTRODE - A positive electrode active material is formed of a lithium containing layered oxide. The lithium containing layered oxide contains either or both of Li | 07-08-2010 |
20110117448 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - An object of the invention is to provide an inexpensive non-aqueous electrolyte secondary battery that allows reversible charge and discharge to be carried out. The non-aqueous electrolyte secondary battery according to the invention includes a positive electrode, a negative electrode containing carbon capable of storing and releasing potassium, and a non-aqueous electrolyte including potassium ions. | 05-19-2011 |
20110200879 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD OF MANUFACTURING THE SAME - A non-aqueous electrolyte secondary battery has a positive electrode containing a positive electrode active material, a negative electrode, and a non-aqueous electrolyte. The positive electrode active material includes a lithium-containing oxide obtained by ion exchanging a portion of sodium contained in a cobalt-containing oxide with lithium, the cobalt-containing oxide represented by the formula Li | 08-18-2011 |
20110236758 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND FABRICATION METHOD FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte secondary battery according to the present invention has a positive electrode comprising a positive electrode active material, a negative electrode comprising a negative electrode active material and a non-aqueous electrolyte, wherein a mixture of at least one metal selected from zinc and cadmium having an average particle diameter in a range of from 0.25 μm to 100 μm and carbon is used as the negative electrode active material. | 09-29-2011 |
20110244332 | 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. The positive electrode active material includes a lithium-containing oxide Li | 10-06-2011 |
20120082898 | METHOD FOR PRODUCING NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A method for producing a nonaqueous electrolyte secondary battery including a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, and a nonaqueous electrolyte, the negative electrode active material containing a carbon material and particles of at least one metal selected from zinc and aluminum. The method includes a step of preparing an aqueous negative electrode mixture slurry that contains the metal particles, the carbon material, and a polysaccharide polymer as a thickener and that has pH adjusted in the range of 6.0 to 9.0; and a step of forming a negative electrode by applying the negative electrode mixture slurry to a negative electrode current collector. | 04-05-2012 |
20120279055 | NON-AQUEOUS ELECTROLYTE BATTERY - A non-aqueous electrolyte battery has a working electrode 1 having a positive electrode active material, a counter electrode 2, and a non-aqueous electrolyte containing lithium. The positive electrode active material includes a lithium pre-doped transition metal oxide prepared by pre-doping lithium into a sodium-containing transition metal oxide having an initial charge-discharge efficiency of higher than 100% as determined by charging and discharging using a lithium metal negative electrode as a counter electrode, and the sodium-containing transition metal oxide is represented by the compositional formula Na | 11-08-2012 |