Abstract: Provided is an electrode for a battery which effectively suppress a short circuit between a positive electrode and a negative electrode at high temperature of the battery. The electrode includes a current collector 110, an active material layer 111 formed on at least one side of the current collector 110 and an insulating layer 112 formed on the surface of the active material layer 111. The electrode was formed so that peeling occurs between the current collector 110 and the active material layer 111 and the peeling strength was 10 mN/mm or more when a 90° peeling test was performed at a peeling rate of 100/min.

Abstract: There is provided a negative electrode (100) for a lithium ion secondary battery, in which a negative electrode active material layer (120) containing at least a negative electrode active material and a binder is formed on a current collector (110). An insulating layer (300) containing at least an insulating material and a binder is further provided on a surface of the negative electrode active material layer (120), the binder contained in the insulating layer (300) includes at least styrene-butadiene rubber and at least one selected from carboxymethyl cellulose and salts thereof, and the binder contained in the negative electrode active material layer (120) is at least one selected from polyacrylic acid and salts thereof.

Abstract: One of the objects of the present invention is to suppress mixing of a first layer and a second layer while forming the second layer before drying the first layer when manufacturing the electrode for the secondary battery in which the first layer and the second layer are laminated on the current collector. A method for manufacturing an electrode used as a positive electrode and a negative electrode of a secondary battery according to the present invention comprises applying a first layer slurry to a surface of a current collector, applying a second layer slurry on the first layer slurry before the first layer slurry is dried, and drying the first layer slurry and the second layer slurry after applying the first layer slurry and the second layer slurry to obtain a laminated structure in which a first layer and a second layer are laminated in this order on the current collector.

Abstract: A purpose of the present invention is to provide a lithium ion secondary battery in which an increase in internal resistance is suppressed and a halogenated cyclic anhydride is used as an electrolyte additive. The lithium ion secondary battery according to the present invention comprises a positive electrode and an electrolyte solution, wherein a porous layer comprising an insulating filler is formed on the positive electrode, and the electrolyte solution comprises 0.005 to 10 weight % of a halogenated cyclic acid anhydride.

Abstract: Disclosed is an electrode, comprising: a metal foil; an electrode layer formed on at least one surface of the metal foil; and an insulating layer formed on the electrode layer; wherein boundary portion between the insulating layer and the electrode layer is in a state in which a part of the insulating layer engages into a part of the electrode layer, and Ls/L is 1.25 or more, wherein a reference length of a straight line in a direction in which the metal foil extends is taken as L and a boundary length along boundary between the insulating layer and the electrode layer is taken as Ls.

Abstract: A method for manufacturing an electrode for a secondary battery includes: applying a first layer slurry containing a first binder to a surface of a current collector, applying a second layer slurry containing a second binder on the first layer slurry before the first layer slurry is dried, and drying the first layer slurry and the second layer slurry after applying the first layer slurry and the second layer slurry to obtain a laminated structure in which a first layer and a second layer are laminated in this order on the current collector. The second layer slurry has a solid content ratio of more than 50% by mass and a composition ratio of the second binder of more than 2% by mass.

Abstract: A purpose of the present invention is to provide an electrode assembly and a manufacturing method therefor that can favorably suppress a short circuit that is due to a burr created by punching. At least one of the cathode 11 and the anode 12 of the electrode assembly of the present invention is covered with an insulating layer. The cathode 11 and the anode 12 are oriented such that the burr 11b of the cathode 11 and the burr 12b of the anode 12 of the opposing cathode 11 and the opposing anode 12 close to at least the outer peripheral edge of the cathode 11 and the outer peripheral edge of the anode 12 do not face each other 12 are opposed to each other.

Abstract: A purpose of the present invention is to provide an electrode assembly and a manufacturing method therefor that can favorably suppress a short circuit that is due to a burr created by punching. At least one of the cathode 11 and the anode 12 of the electrode assembly of the present invention has the maximum height of the burrs 11b and 12b at the portion where the outer peripheral edge of the cathode 11 and the outer peripheral edge of the anode 12 of the opposing cathode 11 and the anode 12 are close to each other, among the peripheral edge of the cathode 11 and the peripheral edge of the anode 12, the maximum height of burrs in the remaining portion other than the portion where they are close to each other is smaller.

Abstract: A method of manufacturing an electrode, comprising the steps of: forming a first layer by intermittently applying a layer to a current collecting foil with thickness of 40 ?m or more and 300 ?m or less; and forming a second layer, wherein the second layer is formed both on a region where the first layer has been formed on the current collecting foil and an exposed region where the current collecting foil is exposed without being formed the first layer; wherein in the step of forming of second layer, providing a gap of 40 ?m or more between a applying part of application apparatus and the current collecting foil, based on a positional information of the first layer, from during applying a layer to the exposed region to during applying a layer to the first layer.

Abstract: One of the objects of the present invention is to provide an electrode having an active material layer and an insulating layer formed on a current collector in which the insulating layer has sufficient adhesion and which can be manufactured without significantly changing the manufacturing process. The electrode comprises a current collector 110, an active material layer 111 formed on at least one surface of the current collector 110, and an insulating layer 112 formed on the surface of the active material layer 111. The active material layer 111 includes an active material and a first binder. The insulating layer 112 includes non-conductive particles and a second binder. An interfacial binder ratio, which is a ratio of amount of a binder existing in an interface region between the active material layer 111 and the insulating layer 112 per unit thickness of the interface region to amount of a binder existing in the active material layer 111 per unit thickness of the active material layer 111, is 85% or more.

Abstract: A secondary battery electrode manufacturing method comprises applying a slurry for a first layer to a current collector, applying a slurry for a second layer to the slurry for the first layer before the slurry for the first layer dries, and drying the slurries to obtain a laminated structure in which the first and second layers are laminated in this order on the current collector. A first and second binder or thickener for the respective slurries are selected such that when viscosities are measured for a first solution including solvent and the first binder or thickener dissolved in the solvent in a specific mass ratio and a second solution including a solvent and the second binder or thickener dissolved in the solvent at the same mass ratio under the same conditions, the viscosity of the first solution is higher than the viscosity of the second solution.

Abstract: A method for manufacturing an electrode for a secondary battery includes: applying a first layer slurry containing a first binder to a surface of a current collector, applying a second layer slurry containing a second binder on the first layer slurry before the first layer slurry is dried, and drying the first layer slurry and the second layer slurry after applying the first layer slurry and the second layer slurry to obtain a laminated structure in which a first layer and a second layer are laminated in this order on the current collector. The second layer slurry has a solid content ratio of more than 50% by mass and a composition ratio of the second binder of more than 2% by mass.

Abstract: Provided is an electrode for a battery which effectively suppress a short circuit between a positive electrode and a negative electrode at high temperature of the battery. The electrode includes a current collector 110, an active material layer 111 formed on at least one side of the current collector 110 and an insulating layer 112 formed on the surface of the active material layer 111. The electrode was formed so that peeling occurs between the current collector 110 and the active material layer 111 and the peeling strength was 10 mN/mm or more when a 90° peeling test was performed at a peeling rate of 100/min.

Abstract: A battery having a battery element with an outer package made of a film that includes a first portion having a first bottom wall and a first side wall rising from an outer peripheral end of the first bottom wall over an entire outer peripheral end of the first bottom wall, a second portion having a second bottom wall and a second sidewall rising from an outer peripheral end at least at a part of the outer peripheral end of the second bottom surface, and a joining portion in which outer peripheral portions of the first and second portions are joined when the battery element is between the first and second bottom walls and the first and second portions face each other, wherein the joining portion includes a sidewall joining portion in which the first and second sidewalls are joined and located outside a thickness range of the battery element.

Abstract: A purpose of the present invention is to provide a lithium ion secondary battery in which an increase in internal resistance is suppressed and a halogenated cyclic anhydride is used as an electrolyte additive. The lithium ion secondary battery according to the present invention comprises a positive electrode and an electrolyte solution, wherein a porous layer comprising an insulating filler is formed on the positive electrode, and the electrolyte solution comprises 0.005 to 10 weight % of a halogenated cyclic acid anhydride.

Abstract: The secondary battery comprises: a battery element 20 having a positive electrode 30 wherein positive active material 31 are applied on both surfaces of a positive current collector 32, a negative electrode 40 wherein negative active material 41 are applied on both surfaces of a negative current collector 42, and a separator; a packaging film 10, made of a film that includes a heat-seal resin layer 13, for accommodating the battery element; wherein a melting point or a decomposition temperature of the separator is higher than a melting point of the heat-seal resin layer by 50° C. or more; and wherein, at least a part of the active material layer 31, 41 of the positive electrode or the negative electrode and the heat-seal resin layer are heat-sealed to each other at at least one surface of the upper surface and the lower surface of the battery element.

Abstract: One of the objects of the present invention is to suppress mixing of a first layer and a second layer while forming the second layer before drying the first layer when manufacturing the electrode for the secondary battery in which the first layer and the second layer are laminated on the current collector. A method for manufacturing an electrode used as a positive electrode and a negative electrode of a secondary battery according to the present invention comprises applying a first layer slurry to a surface of a current collector, applying a second layer slurry on the first layer slurry before the first layer slurry is dried, and drying the first layer slurry and the second layer slurry after applying the first layer slurry and the second layer slurry to obtain a laminated structure in which a first layer and a second layer are laminated in this order on the current collector.

Abstract: A film package battery 1 has a battery element (20) having a positive electrode, a negative electrode and a separator that are stacked or wound, wherein, at least at 200° C., the separator does not melt or soften and has a heat shrinkage ratio of 3% or less; a film package (10) enclosing the battery element; and a fixing tape (70) fixed to a part of the battery element and fixed to an inner surface of the film package.

Abstract: Disclosed is an electrode, comprising: a metal foil; an electrode layer formed on at least one surface of the metal foil; and an insulating layer formed on the electrode layer; wherein boundary portion between the insulating layer and the electrode layer is in a state in which a part of the insulating layer engages into a part of the electrode layer, and Ls/L is 1.25 or more, wherein a reference length of a straight line in a direction in which the metal foil extends is taken as L and a boundary length along boundary between the insulating layer and the electrode layer is taken as Ls.

Abstract: A purpose of the present invention is to provide an electrode assembly and a manufacturing method therefor that can favorably suppress a short circuit that is due to a burr created by punching. At least one of the cathode 11 and the anode 12 of the electrode assembly of the present invention has the maximum height of the burrs 11b and 12b at the portion where the outer peripheral edge of the cathode 11 and the outer peripheral edge of the anode 12 of the opposing cathode 11 and the anode 12 are close to each other, among the peripheral edge of the cathode 11 and the peripheral edge of the anode 12, the maximum height of burrs in the remaining portion other than the portion where they are close to each other is smaller.