Abstract: A positive electrode includes at least a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is formed on a surface of the positive electrode current collector. The positive electrode current collector includes an aluminum foil and a porous film. The porous film covers a surface of the aluminum foil. The porous film contains at least aluminum oxide. The porous film has a thickness not smaller than 10 nm and not greater than 800 nm. The porous film has a dynamic hardness not lower than 5 and not higher than 200.

Abstract: A positive electrode includes at least a positive electrode current collector, a conductive material, and a positive electrode active material. The positive electrode active material is disposed on a surface of the positive electrode current collector. The positive electrode current collector includes an aluminum foil and an aluminum oxide hydrate film. The aluminum oxide hydrate film covers a surface of the aluminum foil. The aluminum oxide hydrate film has a thickness not smaller than 10 nm and not greater than 500 nm. The aluminum oxide hydrate film has a porosity not lower than 10% and not higher than 50%. At least part of the conductive material is disposed within pores in the aluminum oxide hydrate film.

Abstract: A method of manufacturing a non-aqueous electrolyte solution secondary battery includes: (A) preparing a first composite material by mixing a first positive electrode active material, a first conductive material and a first binder; (B) preparing a second composite material by mixing a second positive electrode active material, a second conductive material and a second binder; and (C) manufacturing a positive electrode by forming a positive electrode composite layer including the first composite material and the second composite material. The first positive electrode active material has an average discharge potential lower than that of the second positive electrode active material. The first conductive material has a first OAN. The second conductive material has a second OAN. A ratio of the second OAN to the first OAN is 1.3 or more and 2.1 or less. A sum of the first OAN and the second OAN is 31.64 ml/100 g or less.

Abstract: A non-aqueous electrolyte secondary battery includes at least a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte. The positive electrode includes a positive electrode current collector, a protection layer, and a positive electrode composite material layer. The protection layer, arranged between the positive electrode current collector and positive electrode composite material layer, includes at least a first and second protection layer. The first protection layer, arranged on a surface of the positive electrode current collector, contains a first conductive material and a first resin being a non-thermoplastic polyimide resin. The second protection layer, arranged on a surface of the first protection layer, contains at least a second conductive material and a resin A being a thermoplastic resin. A melting point of the resin A is lower than a thermal decomposition temperature of the first resin. The resin A is greater in expansion coefficient than the first resin.

Abstract: A method for manufacturing an electrode sheet includes the steps of forming a granulated material containing a plurality of granules; forming an electrode mixture layer by molding the granulated material into a sheet; and placing the electrode mixture layer on electrode current collector foil. The step of forming the granulated material includes the steps of forming a granule containing at least an electrode active material and a binder; and adhering a polyglycerol fatty acid ester to a surface of the granule.

Abstract: A positive electrode for a non-aqueous electrolyte secondary battery includes a positive electrode current collector, a protective layer provided on a surface of the positive electrode current collector, and a positive electrode composite material layer containing a positive electrode active material provided on a surface of the protective layer. The protective layer includes an insulating filler, a binder, and a conductive material. The protective layer is composed of a central portion and an end portion in a plan view as seen from the stacking direction. The ratio of the conductive material in the end portion of the protective layer is smaller than the ratio of the conductive material in the central portion of the protective layer. The ratio Sc/S of the area Sc of the end portion of the protective layer to the total area S of the protective layer in plan view is 0.12 or more.

Abstract: A non-aqueous electrolyte secondary battery includes at least an electrode composite material layer, an intermediate layer, and an electrode current collector. The intermediate layer is arranged between the electrode composite material layer and the electrode current collector. The intermediate layer contains at least a foaming filler, a resin, and a conductive material. A value calculated by dividing an amount (mass %) of the foaming filler by an amount (mass %) of the resin is not smaller than 1.1 and not greater than 2.8 and a value calculated by dividing an amount (mass %) of the foaming filler by an amount (mass %) of the conductive material is not smaller than 8 and not greater than 14. The intermediate layer has a thickness not smaller than 2 ?m and not greater than 7 ?m.

Abstract: A separator is for a non-aqueous electrolyte secondary battery. The separator includes at least a porous film. The porous film contains a resin composition. The resin composition contains a thermoplastic resin and metal hydroxide particles.

Abstract: A positive electrode plate includes a positive electrode composite material layer. The positive electrode composite material layer contains at least a positive electrode active material and a flame retardant. The flame retardant contains phosphorus (P) or sulfur (S). The flame retardant has a thermal decomposition temperature not lower than 80° C. and not higher than 210° C. A value calculated by dividing a porosity (%) of the positive electrode composite material layer by an amount (mass %) of P and S contained in the positive electrode composite material layer is not smaller than 5 and not greater than 5000.

Abstract: A non-aqueous electrolyte secondary battery includes at least an electrode composite material layer, an intermediate layer, and an electrode current collector. Intermediate layer is interposed between electrode composite material layer and electrode current collector. Intermediate layer contains at least insulating particles and conductive particles. Each insulating particle has an arc shape in a cross section of intermediate layer along a thickness direction. More conductive particles are present on an outer-circumference side of each arc shape than on an inner-circumference side of the arc shape.

Abstract: A nonaqueous electrolyte secondary battery includes a fiber layer, which contains fiber composed of a synthetic resin, between a separator and a positive electrode and/or between the separator and a negative electrode. The fiber layer contains at least PVDF and PTFE as components of the synthetic resin configuring the fiber. The PVDF and the PTFE both have an average molecular weight of equal to or greater than 200,000 and equal to or less than 2,000,000. In the components of the synthetic resin configuring the fiber, the content of PVDF is greater than the content of PTFE, and the content of PTFE is equal to or less than 45% by mass with respect to the total amount of the components of the synthetic resin.

Abstract: A separator includes a base material layer and a heat resistance layer. The heat resistance layer includes, in a direction of thickness of the heat resistance layer, a central portion and a first end portion and a second end portion between which the central portion lies. The first end portion includes an interface with an electrode. The second end portion includes an interface with the base material layer. A composition ratio of a resin binder to a total mass of inorganic particles and the resin binder in the first end portion and the second end portion is not lower than 8 mass % and not higher than 30 mass %. A composition ratio of the resin binder to a total mass of the inorganic particles and the resin binder in the central portion is not lower than 2 mass % and not higher than 7 mass %.

Abstract: A nonaqueous battery includes a positive electrode and a negative electrode. At least one of the positive electrode and the negative electrode includes a current collector, an intermediate layer, and an active material layer. The intermediate layer is interposed between the current collector and the active material layer and includes graphite particles and insulating particles. In a cross section of the intermediate layer in a thickness direction, a major axis diameter of the graphite particles is equal to or greater than the thickness of the intermediate layer. In X-ray diffraction measurement of the intermediate layer by an out-of-plane method, a ratio of an intensity of an 110 diffraction line of a graphite crystal to an intensity of a 002 diffraction line of the graphite crystal is 0.0011 or more.

Abstract: A nonaqueous battery includes a current collector that supports an electrode active material. The current collector includes a first layer, a second layer and a third layer. The second layer is interposed between the first layer and the third layer. The second layer includes 0.3 mass % or more and 1 mass % or less of magnesium and 0.2 mass % or more and 0.9 mass % or less of silicon, with a remainder being made up of aluminum. The first layer and the third layer constitute outer surfaces of the current collector. The first layer and the third layer each include 99.3 mass % or more of aluminum. In both of the first layer and the third layer, there is less than 0.3 mass % of magnesium and less than 0.2 mass % of silicon.

Abstract: A battery includes an electrode plate group. The electrode plate group includes electrode plates and a separator. The electrode plate group is obtained by laminating a plurality of electrode plates. The separator is disposed between the electrode plates. A surface of at least one of the electrode plates is a particle layer. A surface of the separator is a nonwoven fabric layer. The particle layer includes fibrous particles. The particle layer and the nonwoven fabric layer are in contact with each other.

Abstract: A secondary battery includes a wound electrode assembly in which a positive electrode sheet, a negative electrode sheet and a separator are stacked and wound. The positive electrode sheet is provided with a long positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is disposed on the positive electrode current collector. The negative electrode sheet is provided with a long negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is disposed on the negative electrode current collector. The separator is interposed between the positive electrode sheet and the negative electrode sheet. The negative electrode current collector has a first active material layer-free region at one edge of the negative electrode current collector in a winding direction of an axis of the wound electrode assembly.

Abstract: Provided is a secondary battery that exhibits excellent retention of an electrolyte solution in an electrode body and excellent high rate charging and discharging characteristics. A secondary battery provided by the present invention includes an electrode body, which has a positive electrode, a negative electrode and a separator that electrically isolates the positive electrode from the negative electrode, and an electrolyte solution. In addition, the secondary battery has a non-woven fabric layer between the separator and the positive electrode and/or between the separator and the negative electrode. At least some of the fibers that constitute the non-woven fabric layer have one non-through hole in each of the fibers, with the non-through hole having an opening in one end of the fiber in a length direction thereof and extending in the length direction of the fiber.

Abstract: A separator 1 for a nonaqueous electrolyte secondary battery, includes a resin-made substrate (2) and a porous heat resistance layer (4) disposed on the substrate. The porous heat resistance layer includes an inorganic filler (6) and hollow bodies (7). The hollow body includes a shell portion and a hollow portion. The shell portion is formed of an acryl resin. The hollow portion is formed inside the shell portion. An opening portion extending through the shell portion to spatially interconnect the hollow portion and the outside of the shell portion is formed in the shell portion.

Abstract: This invention provides a lithium secondary battery that comprises a positive electrode comprising a positive electrode active material layer and a negative electrode comprising a negative electrode active material layer. The positive electrode active material layer and the negative electrode active material layer are placed to face each other. The negative electrode active material layer has an area A comprising a non-positive-electrode-facing portion that does not face the positive electrode active material layer. The area A comprises a negative electrode active material, a hot-melt binder and a temperature-sensitive thickener. The hot-melt binder has a melting point and the temperature-sensitive thickener has a gelation temperature both in a range of 45° C. to 100° C.

Abstract: A method of manufacturing a negative electrode for a nonaqueous electrolyte secondary battery includes: preparing a copper foil having a first main surface and a second main surface that are opposite sides of the copper foil; obtaining a granulated body by mixing a negative electrode active material, a thickener, a binder, and a solvent with each other to obtain a mixture and by granulating the mixture; obtaining a first negative electrode mixture layer by pressing the granulated body; arranging the first negative electrode mixture layer on the first main surface; and softening the copper foil by bringing the second main surface into contact with a heated roller in a state where the first negative electrode mixture layer is arranged on the first main surface. A temperature of the heated roller is a recrystallization temperature of the copper foil or higher.