Abstract: A battery 1000 according to the present disclosure includes a first electrode 101, a second electrode 103, and an electrolyte layer 102 positioned between the first electrode 101 and the second electrode 103. The first electrode 101 includes a current collector 100 and an active material layer 104 positioned between the current collector 100 and the electrolyte layer 102. The active material layer 104 includes an alloy, and the alloy includes Bi and Mn. A method for producing an electrode according to the present disclosure includes: forming a plating layer on a current collector by electroplating, the plating layer including a Bi plating film and a Mn plating film; and heating the current collector and the plating layer to obtain an electrode in which an active material layer including an alloy is formed on the current collector, the alloy including Bi and Mn.

Abstract: Provided is a battery including: a first electrode; a second electrode; and an electrolyte layer located between the first electrode and the second electrode, wherein the first electrode includes: a current collector; and an active material layer located between the current collector and the electrolyte layer, the active material layer contains Bi as a main component of an active material, and the active material has a density of from 6.0 g/cm3 to 9.8 g/cm3, inclusive.

Abstract: A hydrogen system includes: a water electrolysis apparatus including a water electrolysis cell; an electrochemical hydrogen pump that increases the pressure of hydrogen-containing gas produced by the water electrolysis apparatus; a gas flow path that supplies the hydrogen-containing gas produced by the water electrolysis apparatus to the electrochemical hydrogen pump; and a first flow path through which a first heat medium that is a liquid and has collected waste heat of the water electrolysis cell flows. The electrochemical hydrogen pump is capable of performing heat exchange with the first heat medium having collected waste heat of the water electrolysis cell.

Abstract: Battery according to the present disclosure includes first electrode, second electrode, and electrolyte solution. First electrode includes a base material that is a porous body and an active material layer located on a surface of the base material. The active material layer contains an alloy containing Bi and Ni. The active material layer may contain an alloy containing Bi and Ni as a main component of the active material. In battery, for example, first electrode may be a negative electrode, and second electrode may be a positive electrode.

Abstract: Battery according to the present disclosure includes first electrode, second electrode, and electrolytic solution. First electrode includes a base material that is a porous body and an active material layer positioned on a surface of the base material. The active material layer contains Bi. The active material layer may contain Bi as a main component of an active material. In battery, for example, first electrode may be a negative electrode, and second electrode may be a positive electrode.

Abstract: A battery according to the present disclosure includes: a positive electrode; a negative electrode; and an electrolyte layer positioned between the positive electrode and the negative electrode. The positive electrode includes a positive electrode material. The positive electrode material includes a positive electrode active material and a first solid electrolyte material. The positive electrode active material includes an oxide consisting of Li, Ni, Mn, and O. The first solid electrolyte material includes: Li; at least one selected from the group consisting of metalloid elements and metal elements except Li; and at least one selected from the group consisting of F, Cl, and Br. The negative electrode includes an alloy as a negative electrode active material, and the alloy includes Ni and Bi.

Abstract: A battery of the present disclosure includes a first electrode, a second electrode, and a solid electrolyte layer disposed between the first electrode and the second electrode. The solid electrolyte layer includes a first solid electrolyte. The first electrode includes: a substrate including a porous body; and an active material layer disposed on a surface of the substrate. The active material layer contains an alloy that contains Bi and Ni.

Abstract: A battery includes: a first electrode; a second electrode; and an electrolyte solution, wherein the first electrode includes a current collector and an active material layer, the active material layer contains BiNi, and the BiNi has a crystal structure, a space group of the crystal structure belonging to C2/m.

Abstract: An electrode includes a current collector, a first electrode layer including a first active material containing Mo and O, and a second electrode layer including a second active material containing Li, Ti, and O. At least one selected from the group consisting of the first electrode layer and the second electrode layer includes a solid electrolyte.

Abstract: A battery includes a first electrode; a second electrode; and a solid electrolyte layer disposed between the first electrode and the second electrode. The solid electrolyte layer contains a first solid electrolyte. The first electrode includes: a substrate including a porous body; and an active material layer disposed on a surface of the substrate. The active material layer contains Bi. The first solid electrolyte contains a halide solid electrolyte.

Abstract: A battery according to the present disclosure includes: a positive electrode; a negative electrode; and an electrolyte layer positioned between the positive electrode and the negative electrode. The positive electrode includes a positive electrode material. The positive electrode material includes a positive electrode active material and a first solid electrolyte material. The positive electrode active material includes an oxide consisting of Li, Ni, Mn, and O. The first solid electrolyte material includes: Li; at least one selected from the group consisting of metalloid elements and metal elements except Li; and at least one selected from the group consisting of F, Cl, and Br. The negative electrode includes an alloy as a negative electrode active material, and the alloy includes Ni and Bi.

Abstract: A battery according to the present disclosure includes a positive electrode, a negative electrode, and an electrolyte layer positioned between the positive electrode and the negative electrode. The positive electrode includes a positive electrode material. The positive electrode material includes a positive electrode active material and a first solid electrolyte material. The positive electrode active material includes LixMnyO2, where 0?x?1.05 and 0.9?y?1.1 are satisfied. The negative electrode includes an alloy as a negative electrode active material, and the alloy includes Ni and Bi.

Abstract: A positive electrode active material includes LixMnyO2, wherein 1.012?x?0.683 and 0.91?y?1.0.

Abstract: A battery according to the present disclosure includes a positive electrode, a negative electrode, and an electrolyte layer positioned between the positive electrode and the negative electrode. The positive electrode includes a positive electrode material. The positive electrode material includes a positive electrode active material and a first solid electrolyte material. The positive electrode active material includes LixMnyO2, where 0?x??1.05 and 0.9?y?1.1 are satisfied. The negative electrode includes Bi as a main component of a negative electrode active material.

Abstract: A battery according to the present disclosure includes: a positive electrode; a negative electrode; and an electrolyte layer positioned between the positive electrode and the negative electrode. The positive electrode includes a positive electrode material. The positive electrode material includes a positive electrode active material and a first solid electrolyte material. The positive electrode active material includes an oxide consisting of Li, Ni, Mn, and O. The first solid electrolyte material includes: Li; at least one selected from the group consisting of metalloid elements and metal elements except Li; and at least one selected from the group consisting of F, Cl, and Br. The negative electrode includes Bi as a main component of a negative electrode active material.

Abstract: An electrode material according to an aspect of the present disclosure includes a first active material containing Li, Ti, and O, a second active material containing Mo and O, and a solid electrolyte. A battery according to an aspect of the present disclosure includes a first electrode, a second electrode, and an electrolyte layer arranged between the first electrode and the second electrode. At least one selected from the group consisting of the first electrode and the second electrode includes the electrode material.

Abstract: A battery includes: a first electrode; a second electrode; and an electrolytic solution, wherein the first electrode includes a current collector and an active material layer, the active material layer contains Bi as a main component of an active material, and the electrolytic solution contains at least one selected from the group consisting of vinylene carbonate and fluoroethylene carbonate.

Abstract: A battery includes a first electrode, a second electrode, and a solid electrolyte layer disposed between the first electrode and the second electrode, the first electrode includes a current collector and an active material layer disposed between the current collector and the solid electrolyte layer, the active material layer contains Bi3Ni, and the Bi3Ni has a crystal structure of space group Pnma.

Abstract: A battery includes a first electrode, a second electrode, and a solid electrolyte layer disposed between the first electrode and the second electrode, the first electrode includes a current collector and an active material layer disposed between the current collector and the solid electrolyte layer, the active material layer contains BiNi, and the BiNi has a crystal structure of space group C2/m.

Abstract: A battery includes a first electrode, a second electrode, and a solid electrolyte layer disposed between the first electrode and the second electrode, in which the first electrode includes a current collector and an active material layer disposed between the current collector and the solid electrolyte layer, and the active material layer contains Bi as a main component of an active material.