Abstract: There is provided a technique for improving an energy density and safety of a lithium secondary battery. The lithium secondary battery includes an electrode tab and a plurality of positive electrode laminates that are disposed to be spaced from each other in a lamination direction through an interposed negative electrode and separator. Each of the positive electrode laminates has a current collector that is constituted of an insulating layer sandwiched by conductive layers and that is electrically connected to the electrode tab, and a positive electrode provided on both surfaces of the current collector. At least one of the current collectors of the plurality of positive electrode laminates and at least one other current collector are joined to the electrode tab at positions different from each other in a case of being viewed from the lamination direction.

Abstract: An oxide catalyst to be used for gas-phase catalytic ammoxidation reaction of propane or isobutane, the oxide catalyst comprising a composite oxide, wherein the composite oxide comprises a catalytically active species to be isolated from the composite oxide using a hydrogen peroxide solution, and the catalytically active species has an average composition represented by the following formula (1) in STEM-EDX measurements; Formula: MolVaSbbNbcWdXeOn??(1) wherein X represents at least one selected from the group consisting of Te, Ce, Ti, and Ta; a, b, c, and d satisfy relations represented by a formulae of 0.050?a?0.200, 0.050?b?0.200, 0.100?c?0.300, 0?d?0.100, 0?e?0.100, and a?c; and n represents a number determined by valences of the other elements.

Abstract: The purpose of the present invention is to provide a secondary battery having a high energy density and excellent cycle characteristics, in which the secondary battery has a configuration making it possible to be assembled in a short time. The secondary battery of the present invention includes a laminate formed by winding a sheet having a negative electrode and separators disposed on both surfaces of the negative electrode so that the sheet is folded back a plurality of times; and a plurality of positive electrodes that are respectively disposed in each gap formed between the separators facing each other in the laminate.

Abstract: The present invention provides an electrolyte solution for a lithium secondary battery, which can achieve both a high energy density and excellent cycle characteristics. The present invention relates to an electrolyte solution for a lithium secondary battery, the electrolyte solution including a cyclic compound represented by Formula (1) or Formula (2), a hydrofluoroether, an ether not having a fluorine atom, and a lithium salt.

Abstract: The purpose of the present invention is to provide a lithium secondary battery in which a high energy density, an excellent cycle characteristic, and a high stability against changes in environmental temperature are achieved. The present invention relates to a lithium secondary battery including a positive electrode, a negative electrode not having a negative-electrode active material, and an electrolyte solution, in which the electrolyte solution contains, as a solvent, an ether not having a fluorine atom, a hydrofluoroether, and a saturated or unsaturated chain hydrofluorocarbon.

Abstract: The present invention provides a lithium secondary battery having a high energy density and excellent cycle characteristics and productivity, a method for manufacturing the lithium secondary battery, and the like. The present invention relates to a lithium secondary battery (and its associated methods) including a positive electrode, and a negative electrode which does not have a negative electrode active material, in which the positive electrode contains a positive electrode active material and a lithium-containing compound represented by Li6MnxCo1-xO4 (0<x<1).

Abstract: Provided is a composition for catalyst production which is used in the production of a catalyst for gas phase catalytic oxidation reaction or a catalyst for gas phase catalytic ammoxidation reaction, wherein the composition for catalyst production is an aqueous solution containing a niobium compound and hydrogen peroxide and optionally containing an organic acid, a molar ratio (organic acid/Nb) of a concentration of the organic acid to a Nb concentration is 0.00 or more and 2.00 or less, and a molar ratio (hydrogen peroxide/Nb) of a concentration of the hydrogen peroxide to a Nb concentration is 0.01 or more and 50 or less.

Abstract: An oxide catalyst to be used for gas-phase catalytic ammoxidation reaction of propane or isobutane, the oxide catalyst comprising a composite oxide, wherein the composite oxide comprises a catalytically active species to be isolated from the composite oxide using a hydrogen peroxide solution, and the catalytically active species has an average composition represented by the following formula (1) in STEM-EDX measurements; Formula: Mo1VaSbbNbcWdXeOn ??(1) wherein X represents at least one selected from the group consisting of Te, Ce, Ti, and Ta; a, b, c, and d satisfy relations represented by a formulae of 0.050?a?0.200, 0.050?b?0.200, 0.100?c?0.300, 0?d?0.100, 0?e?0.100, and a?c; and n represents a number determined by valences of the other elements.

Abstract: A low-cost positive electrode material for sodium ion secondary batteries has a high redox potential. A sodium ion secondary battery uses this material as a positive electrode active material. The positive electrode active material for sodium ion secondary batteries contains a sulfate represented by NamMn(SO4)3 (in which M represents a transition metal element; m is 2±2x (in which x satisfies 0?x?0.5); and n is 2±y (in which y satisfies 0?y?0.5)).