Abstract: To provide an electrode configured to decrease the heat generation amount of solid-state batteries. An electrode for solid-state batteries, wherein the electrode comprises an electrode layer, a current collector, and a PTC layer which is disposed between the electrode layer and the current collector and which is in contact with the electrode layer; wherein the PTC layer contains an electroconductive material, Ni and a polymer; and wherein a volume percent of the Ni in the PTC layer is larger than a volume percent of the electroconductive material in the PTC layer.

Abstract: The present invention provides a novel method for producing a calcium aluminate compound having a modified surface. The present invention provides: a method for producing a modified calcium aluminate compound characterized by irradiating a calcium aluminate compound dispersed in an organic dispersion medium with a femtosecond laser, thereby modifying the surface of the calcium aluminate compound; and a modified calcium aluminate compound characterized by being obtained by this method and having at least one of an OH group, a CO group, a CH group, and an NH group.

Abstract: Prior art documents do not describe a method for modifying the surface of a calcium aluminate compound, much less describe a method for controlling the particle diameter of a calcium aluminate compound. The present invention provides a novel method for producing a calcium aluminate compound having a modified surface. The present invention provides: a method for producing a modified calcium aluminate compound characterized by irradiating a calcium aluminate compound dispersed in an organic dispersion medium with a femtosecond laser, thereby modifying the surface of the calcium aluminate compound; and a modified calcium aluminate compound characterized by being obtained by this method and having at least one of an OH group, a CO group, a CH group, and an NH group.

Abstract: An object of the present invention is to provide a method for producing conductive mayenite, with which a reaction is completed in a short time, an operation can be simplified, the reaction is easily controlled, and the cost of energy can be reduced. The present invention is a method for producing conductive mayenite, characterized by mixing a mayenite type compound with a carbon component, placing the resulting mixture in an airtight container, and irradiating the mixture with a microwave in an inert gas atmosphere or in a vacuum atmosphere to heat the mixture.

Abstract: An object of the present invention is to provide a method for producing conductive mayenite, with which a reaction is completed in a short time, an operation can be simplified, the reaction is easily controlled, and the cost of energy can be reduced. The present invention is a method for producing conductive mayenite, characterized by mixing a mayenite type compound with a carbon component, placing the resulting mixture in an airtight container, and irradiating the mixture with a microwave in an inert gas atmosphere or in a vacuum atmosphere to heat the mixture.

Abstract: A positive electrode for a lithium-ion secondary battery includes a positive electrode particle including a positive active material including a lithium salt, and a coating layer including an amorphous carbonaceous layer on a surface of the positive active material, and a sulfide solid electrolyte contacting the coating layer, wherein the sulfide solid electrolyte includes a solid sulfide.

Abstract: An all solid secondary battery including: an exterior body; a cathode including a cathode active material including a transition metal oxide, an anode; and a solid electrolyte layer disposed between the cathode and the anode, wherein the cathode, the anode, and the solid electrolyte layer are disposed in the exterior body, wherein the transition metal oxide is a lithium composite transition metal oxide that contains nickel and at least one metal element other than nickel that belongs to Group 2 to Group 13 of the periodic table, and wherein the total of partial pressures of carbon dioxide and oxygen in the exterior body is 200 pascals or less.

Abstract: A positive active material for a rechargeable lithium battery includes a lithium nickel-based oxide particle and a coating layer surrounding the lithium nickel-based oxide particle, the coating layer including diamond-like carbon. The lithium nickel-based oxide particle includes lithium and a nickel-containing metal. The nickel-containing metal includes about 60 atom % or greater of nickel based on the total atomic amount of the nickel-containing metal. An SP2/SP3 ratio of the coating layer is about 50/50 to about 60/40. A positive active material layer and a rechargeable lithium battery including the same are provided.

Abstract: An all solid secondary battery including: an exterior body; a cathode including a cathode active material including a transition metal oxide, an anode; and a solid electrolyte layer disposed between the cathode and the anode, wherein the cathode, the anode, and the solid electrolyte layer are disposed in the exterior body, wherein the transition metal oxide is a lithium composite transition metal oxide that contains nickel and at least one metal element other than nickel that belongs to Group 2 to Group 13 of the periodic table, and wherein the total of partial pressures of carbon dioxide and oxygen in the exterior body is 200 pascals or less.

Abstract: A positive electrode for a lithium-ion secondary battery includes a positive electrode particle including a positive active material including a lithium salt, and a coating layer including an amorphous carbonaceous layer on a surface of the positive active material, and a sulfide solid electrolyte contacting the coating layer, wherein the sulfide solid electrolyte includes a solid sulfide.