Patent application number | Description | Published |
20120129035 | NON-AQUEOUS ELECTROLYTE TYPE LITHIUM ION SECONDARY CELL - There is provided a lithium ion secondary cell excellent in charging and discharging cycle characteristics. A lithium ion secondary cell includes an electrode body including a positive electrode having a positive electrode active material, a negative electrode having a negative electrode active material, and a separator, and a non-aqueous electrolyte containing a lithium salt as a supporting salt in an organic solvent, the electrode body and the non-aqueous electrolyte being accommodated in a case. The positive electrode active material is a lithium transition metal oxide having a spinel type structure. The electrolyte contains a compound represented by a chemical formula (I) in an amount of β mol relative to the total content α mol of moisture to be mixed in the cell. β satisfies −0.8 log(β/α)≦1.5. | 05-24-2012 |
20120129055 | NON-AQUEOUS ELECTROLYTE TYPE LITHIUM ION SECONDARY CELL - There is provided a lithium ion secondary cell excellent in charging and discharging cycle characteristics. A lithium ion secondary cell includes: an electrode body including a positive electrode having a positive electrode active material, a negative electrode having a negative electrode active material, and a separator; and a non-aqueous electrolyte containing a lithium salt as a supporting salt in an organic solvent, the electrode body and the non-aqueous electrolyte being accommodated in a case. The positive electrode active material is a lithium transition metal oxide having a layered structure. The electrolyte contains a compound represented by a chemical formula (I) in an amount of β mol relative to the total content α mol of moisture to be mixed in the cell. β satisfies −1.3≦log(β/α)≦1. | 05-24-2012 |
20120141869 | METHOD FOR PRODUCING NONAQUEOUS ELECTROLYTE LITHIUM-ION SECONDARY BATTERY - The present invention provides a method for producing a lithium-ion secondary battery with excellent high-temperature storage characteristics. The method for producing the lithium-ion secondary battery provided by the present invention includes a step of assembling a lithium-ion secondary battery using positive and negative electrodes, and a nonaqueous electrolyte containing in an organic solvent a lithium salt as a supporting salt, at least one type of substance selected from carboxylic acid anhydrides and dicarboxylic acids as additive A, and at least one type of substance selected from vinylene carbonate, vinylethylene carbonate, ethylene sulfite, and fluoroethylene carbonate as additive B; a step of carrying out initial charging of the assembled battery to a predetermined voltage; and a step of carrying out an aging treatment by keeping the battery at a temperature of 35° C. or higher for 6 hours or longer. | 06-07-2012 |
20120141884 | NONAQUEOUS ELECTROLYTE LITHIUM ION SECONDARY BATTERY - The present invention provides a lithium-ion secondary battery with excellent high-temperature storage characteristics. The lithium-ion secondary battery provided by the present invention has positive and negative electrodes capable of absorbing and desorbing lithium ions, and an electrolyte solution containing a lithium salt as a supporting salt in an organic solvent. The nonaqueous electrolyte contains not only the lithium salt, but also at least one type of dicarboxylic acid as additive A; and at least one type of additive selected from vinylene carbonate, vinylethylene carbonate, ethylene sulfite, and fluoroethylene carbonate as additive B. | 06-07-2012 |
20120177990 | ELECTRODE PLATE, SECONDARY BATTERY, AND METHOD FOR PRODUCING THE ELECTRODE PLATE - An electrode plate includes a current collector plate and an active material layer formed thereon. The active material layer includes, as a binder, a plurality of binders having different glass transition points (Tg) from each other. A ratio (A | 07-12-2012 |
20120244417 | LITHIUM ION SECONDARY BATTERY - The present invention provides a lithium ion secondary battery in which an electrode assembly, in which a positive electrode sheet having a positive electrode mixture layer and a negative electrode sheet having a negative electrode mixture layer are overlain each other, is housed in a container together with a nonaqueous electrolyte solution. The negative electrode mixture layer includes a carbon material having at least in part a graphite structure as a negative active material. When S (m | 09-27-2012 |
20120251878 | LITHIUM SECONDARY BATTERY AND MANUFACTURING METHOD THEREFOR - The lithium secondary battery provided by the present invention includes a negative electrode having a negative electrode collector and a negative electrode layer including a negative electrode active material and formed on the surface of the negative electrode collector, and is characterized in that the negative electrode layer comprises a negative electrode active material layer composed primarily of a negative electrode active material, and an insulating layer composed primarily of an insulating filler and formed on the negative electrode active material layer, and the ratio (Sb/Sa) of a pore specific surface area of the insulating layer (Sb: m | 10-04-2012 |
20120258343 | LITHIUM SECONDARY BATTERY - A lithium secondary battery obtained by the present invention has a negative electrode sheet | 10-11-2012 |
20130059207 | NEGATIVE ELECTRODE ACTIVE MATERIAL - As a negative electrode active material that enables steady production of batteries with excellent low-temperature performance, provided is a composite carbon comprising a low-crystalline carbon material at least partially on surfaces of particles of a high-crystalline carbonaceous substance. The negative electrode active material has a tapped density of 0.9 g/cm | 03-07-2013 |
20130065138 | METHOD FOR NEGATIVE ELECTRODE ACTIVE MATERIAL EVALUATION AND NEGATIVE ELECTRODE ACTIVE MATERIAL - Provided is a method for negative electrode active material evaluation useful for steady production of batteries having a prescribed performance level. This evaluation method comprises: (A) running microscopic Raman analysis at a wavelength of 532 nm n times on a sample of a composite carbon comprising a low-crystalline carbon material at least partially on surfaces of particles of a high-crystalline carbonaceous substance (wherein n is 20 or more); (B) with respect to a Raman spectrum obtained in each microscopic Raman analysis run, determining the ratio of its D-band intensity I | 03-14-2013 |
20130177792 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A main object of the present invention to provide a nonaqueous electrolyte secondary battery having high durability towards charge and discharge cycles, by preventing buckling of a wound electrode body. The secondary battery provided by the present invention comprises: a nonaqueous electrolyte; and a wound electrode body | 07-11-2013 |
20130209889 | BATTERY ELECTRODE AND USE THEREOF - An objective is to reduce the sheet resistance and gas evolution in a battery electrode comprising a conductive intermediate layer capable of reducing or shutting off a current when overcharged. A battery electrode ( | 08-15-2013 |
20130212875 | METHOD FOR PRODUCING LITHIUM ION SECONDARY BATTERY - A method for producing a lithium-ion secondary battery comprising positive and negative electrodes and a non-aqueous electrolyte solution is provided. The method comprises (A) with several different negative electrode active materials, determining density X | 08-22-2013 |
20130252111 | LITHIUM ION SECONDARY BATTERY AND METHOD FOR MANUFACTURING LITHIUM ION SECONDARY BATTERY - A lithium ion secondary battery involves a negative electrode sheet including a negative current collector and a negative active material layer that contains negative active material particles including first particles and second particles. In the negative active material layer, the ratio of the first particles to the total negative active material particles in a part on the current collector side in the layer thickness direction of the negative active material layer is higher than the ratio of the first particles to the total negative active material particles in the whole negative active material layer and the ratio of the second particles to the total negative active material particles in a part on an outer surface side of the negative active material layer in the layer thickness direction is higher than the ratio of the second particles to the total negative active material particles in the whole negative active material layer. | 09-26-2013 |
20140065478 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND MANUFACTURING METHOD THEREOF - The present invention provides a method of manufacturing a nonaqueous electrolyte secondary battery in which graphite fissuring during rolling of the negative electrode mixture layer is prevented and a deterioration in the performance of the battery is thereby suppressed. The manufacturing method provided by the present invention is a method of manufacturing a nonaqueous electrolyte secondary battery that has a positive electrode and a negative electrode, and includes: a coating step of coating a current collector | 03-06-2014 |
20140080005 | SECONDARY BATTERY AND METHOD FOR PRODUCING SECONDARY BATTERY - A secondary battery is provided with a negative electrode sheet including a negative active material layer including negative active material particles. The negative active layer contains, as the negative active material particles, graphite particles formed from graphite and amorphous carbon particles formed from amorphous carbon. The difference (ΔS)(=Sb−Sa) in specific surface area between the specific surface area (Sb) of the amorphous carbon particles and the specific surface area (Sa) of the graphite particles is −0.3 to 2.6 m | 03-20-2014 |
20140117940 | LITHIUM-ION SECONDARY BATTERY - A lithium-ion secondary battery ( | 05-01-2014 |
20140141304 | LITHIUM ION SECONDARY BATTERY AND METHOD OF MANUFACTURING LITHIUM ION SECONDARY BATTERY - In a lithium ion secondary battery, a negative electrode sheet is made of a metal foil and an active material layer containing active material particles. The negative active material layer includes a facing portion that faces a positive active material layer and a non-facing portion that does not face the same. The negative active material particles can be oriented in a magnetic field direction. When an angle between an extending direction of a major axis of the cross section of each particle and the metal foil is θ, the number of particles with the angle θ of 60°-90° is MA, the number of negative active material particles with the angle θ of 0°-30° is MB, and a value MA/MB is assumed to be an orientation degree (AL) of particles, the negative active material layer is made such that an orientation degree (AL | 05-22-2014 |
20140154579 | LITHIUM ION SECONDARY BATTERY - A lithium ion secondary battery | 06-05-2014 |
20140170487 | LITHIUM-ION SECONDARY BATTERY - A negative electrode sheet of a lithium-ion secondary battery has a negative electrode current collector and a negative electrode active material layer on the negative electrode current collector. The negative electrode active material layer contains flake graphite particles and has a first region neighboring the negative electrode current collector and a second region neighboring a surface side that are different in perpendicularity of the graphite particles. The perpendicularity of the graphite particles is defined as (m1/m2), where, when the inclination θn of each of the graphite particles is specified relative to a surface of the negative electrode current collector, m1 is the number of the graphite particles having an inclination θn of 60°≦θn≦90° and m2 is the number of the graphite particles having an inclination θn of 0°≦θn≦30°. | 06-19-2014 |
20140170501 | LITHIUM-ION SECONDARY BATTERY AND METHOD OF MANUFACTURING THE SAME - A Lithium-ion secondary battery ( | 06-19-2014 |
20140186702 | LITHIUM-ION SECONDARY BATTERY - A lithium-ion secondary battery ( | 07-03-2014 |
20140242430 | HERMETICALLY SEALED LITHIUM SECONDARY BATTERY - A hermetically sealed lithium secondary battery is provided which has an excellent battery performance and in which a current-interrupt mechanism operates accurately when overcharging occurs. This battery comprising an electrode assembly | 08-28-2014 |
20140248528 | LITHIUM-ION SECONDARY BATTERY - A negative electrode active material layer ( | 09-04-2014 |
20140255783 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND USE THEREOF - The non-aqueous electrolyte secondary battery provided by this invention comprises a positive electrode and a negative electrode, wherein the positive electrode has a positive electrode active material layer comprising a positive electrode active material as a primary component, and the negative electrode has a negative electrode active material layer comprising a negative electrode active material as a primary component, having a negative electrode active material's linseed oil absorption number B (mL/100 g) to positive electrode active material's DBP absorption number A (mL/100 g) ratio B/A of 1.27 to 1.79. | 09-11-2014 |
20140272540 | NONAQUEOUS SECONDARY BATTERY - A nonaqueous secondary battery | 09-18-2014 |
20140335389 | BATTERY - A battery, which is provided with a pressure-type current interrupt mechanism, is provided with: a gas-generating material placed outside an electrode body and within a battery case; a positive electrode potential member that is placed outside the electrode body and within the battery case in a manner contacting the gas-generating material, and conducts with the positive electrode of the electrode body; and a negative electrode potential member that is placed outside the electrode body and within the battery case in a manner contacting the gas-generating material while being spaced from the positive electrode potential member, and conducts with the negative electrode of the electrode body. The gas-generating material includes a gas-generating agent that generates a gas when the potential of the positive electrode potential member exceeds a gas generation potential. | 11-13-2014 |
20140349189 | LITHIUM SECONDARY BATTERY - A lithium secondary battery | 11-27-2014 |
20150010784 | SEALED NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - The present invention provides a sealed nonaqueous electrolyte secondary battery which is equipped with a current interrupt device that is actuated by a rise in internal pressure of a battery case and in which the current interrupt device is actuated in a speedy and stable manner during an overcharge. In the sealed nonaqueous electrolyte secondary battery, an electrode body formed by a positive electrode | 01-08-2015 |
20150030931 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR MANUFACTURING NEGATIVE ELECTRODE FOR SECONDARY BATTERY - The non-aqueous electrolyte secondary battery | 01-29-2015 |