Abstract: In accordance with the present invention, a powdery material and a positive electrode mixture for providing a nonaqueous electrolyte secondary battery capable of exhibiting a higher output under high current rate conditions are provided. The powdery material according to the present invention comprises a positive electrode active material powder having an average particle diameter of from 0.05 ?m to 1 ?m and two or more types of graphite powder wherein the average particle diameters of the two or more types of the graphite powder are different from each other and each graphite powder has an average particle diameter of from 0.01 ?m to 20 ?m. The positive electrode mixture according to the present invention comprises the powdery material, a binder, and a solvent.

Abstract: The positive electrode active material powder of the present invention is a positive electrode active material powder, including primary particles and aggregated particles of primary particles, wherein an average particle diameter of primary particles and aggregated particles of primary particles in the powder is 0.1 ?m or more and 3 ?m or less on a volume basis, the percentage of [volumetric sum of particles having a particle diameter of 5 ?m or more]/[volumetric sum of entire particles] is 10% or less, and a BET specific surface area of the powder is more than 2 m2/g and 7 m2/g or less. When this positive electrode active material powder is used for a nonaqueous electrolyte secondary battery, it becomes possible to exhibit a high discharge capacity and also exhibit a high output at a high current rate.

Abstract: A nonaqueous electrolyte secondary battery comprising a positive electrode containing a granular positive electrode active material composed of a mixed metal oxide and an M3-containing compound (M3 represents one or more elements selected from the group consisting of Group 3B elements in the periodic table, and the M3-containing compound is different from said mixed metal oxide) placed in the form of particles or a layer on the surface of the mixed metal oxide, wherein the positive electrode active material has M1 (M1 represents one or more elements selected from the group consisting of alkali metal elements), M2 (M2 represents one or more elements selected from the group consisting of Mn, Fe, Co and Ni), M3 (M3 has the same meaning as that described above) and O on its surface, and when the molar ratio (M3/M2) of the number of M3 atoms (mol) to the number of M2 atoms (mol) on the surface of the positive electrode active material is represented by A and the BET specific surface area of the positive electro

Abstract: A film-case-type electricity storage device 10 is one storing an electrode group 6 where the cross-section cut in a direction vertical to a winding axis is formed in flat-shape and two square bar-type reinforcing members 11 in a film case 12, and is capable of avoiding deformation of the electrode group 6 inside the film case, even when stress is added to the film-case-type electricity storage device 10 from the outside, by providing with the square bar-type reinforcing members 11 along the both peripheries of the electrode group 6.

Abstract: There is provided a device with which an optional voltage and an optional capacity may be obtained in one device. A device wherein a plurality of electrode groups each comprising a positive electrode sheet having an electrode tab, a negative electrode sheet having an electrode tab, and a separator disposed so as to insulate the positive electrode sheet from the negative electrode sheet, are included in a single vessel. The device being used as a storage device, and the device being used as a nonaqueous electrolytic solution secondary battery.

Abstract: The positive electrode active material powder of the present invention is a positive electrode active material powder, including primary particles and aggregated particles of primary particles, wherein an average particle diameter of primary particles and aggregated particles of primary particles in the powder is 0.1 ?m or more and 3 ?m or less on a volume basis, the percentage of [volumetric sum of particles having a particle diameter of 5 ?m or more]/[volumetric sum of entire particles] is 10% or less, and a BET specific surface area of the powder is more than 2 m2/g and 7 m2/g or less. When this positive electrode active material powder is used for a nonaqueous electrolyte secondary battery, it becomes possible to exhibit a high discharge capacity and also exhibit a high output at a high current rate.

Abstract: The powder for a positive electrode of the present invention comprises a positive electrode active material powder comprising primary particles and aggregated particles of primary particles, 90% or more of particles out of primary particles and aggregated particles of primary particles in the powder having a particle diameter of 0.01 ?m or more and 5 ?m or less, and comprises a graphite powder comprising graphite particles, 90% or more of particles out of graphite particles in the powder having a particle diameter of 0.1 ?m or more and 10 ?m or less as a maximum particle diameter. When the powder for a positive electrode is used for a nonaqueous electrolyte secondary battery, it becomes possible to exhibit a high discharge capacity and also exhibit a high output at a high current rate.

Abstract: A lithium secondary battery that includes a cathode containing, as an active material, a material that can be doped/undoped with lithium ions; an anode containing, as an active material, a lithium metal, a lithium alloy or a material that can be doped/undoped with lithium ions; and a liquid or solid electrolyte. In this lithium secondary battery, the active material used in the cathode is lithiated nickel dioxide containing gallium. As a result, the lithium secondary battery attains excellent cycle and overcharge resistance characteristics and has a high energy density.