Abstract: An all-solid-state battery has a positive electrode layer, a separator layer and a negative electrode layer. The all-solid-state battery satisfies relationships of “Formula (1): 0.99?Sa0/Sc0?1.01,” “Formula (2): 1.00?Sa1/Sa0?1.13,” and “Formula (3): 0.93?Sc1/Sc0?1.02.” Sc0 indicates an area of the positive electrode layer when the SOC is 0%. Sc1 indicates an area of the positive electrode layer when the SOC is 100%. Sa0 indicates an area of the negative electrode layer when the SOC is 0%. Sa1 indicates an area of the negative electrode layer when the SOC is 100%.

Abstract: A battery includes: an electrode layer; a counter electrode layer, which is a counter electrode for the electrode layer; a solid electrolyte layer between the electrode layer and the counter electrode layer; and an electrode current collector electrically coupled to the electrode layer. The solid electrolyte layer includes a first region containing a first solid electrolyte material and a second region containing a second solid electrolyte material. The first region is positioned within a region where the electrode layer and the counter electrode layer face each other. Moreover, a second density, which is of the second solid electrolyte material in the second region, is higher than a first density, which is of the first solid electrolyte material in the first region.

Abstract: A battery includes an electrode collector, two electrode active material layers, two solid electrolyte layers, two counter-electrode active material layers, and two counter-electrode collectors in this order, and includes a first insulating layer that covers side surfaces of the two counter-electrode collectors, the two counter-electrode active material layers, the two solid electrolyte layers, and the two electrode active material layers. A first region not covered with any of the two electrode active material layers is provided at ends of both principal surfaces of the electrode collector. A second region not covered with any of the two counter-electrode collectors is provided at an end of a principal surface of each of the two counter-electrode active material layers that faces toward a corresponding one of the counter-electrode collectors. The first insulating layer covers the second region. The electrode collector projects from an outer surface of the first insulating layer.

Abstract: A method for manufacturing a battery includes: a first cutting step of cutting a laminate at a first cutting position to form a first cut surface, the laminate including at least one battery cell having a positive electrode layer, a negative electrode layer, and a solid electrolyte layer located between the positive electrode layer and the negative electrode layer; and a second cutting step of cutting the laminate cut in the first cutting step at a second cutting position inside the first cutting position to form a second cut surface. In the second cutting step, Rz1<W <5Rz1 is satisfied, where W denotes a distance between the first cut surface and the second cut surface to be formed and Rz1 denotes a surface roughness of the first cut surface.

Abstract: A method for manufacturing a battery includes: a cutting step of forming a cut surface by cutting a laminate having a battery cell having a structure in which an electrode layer, a solid electrolyte layer, and a counter electrode layer are laminated in this order so as to collectively cut the electrode layer, the solid electrolyte layer, and the counter electrode layer; and a cleaning step of removing a deposit adhering to the cut surface, the deposit being generated by cutting the laminate in the cutting step.

Abstract: A battery includes a power-generating element and an insulating layer. The power-generating element includes an electrode layer, a counter-electrode layer placed to face the electrode layer, and a solid electrolyte layer located between the electrode layer and the counter-electrode layer. The insulating layer includes a first insulating film that extends inward from ends of the power-generating element in a planar view of a principal surface of the power-generating element and a second insulating film that covers a side surface of the power-generating element and that is continuous with ends of the first insulating film. The second insulating film is thinner than the first insulating film.

Abstract: A solid electrolyte composition contains a solvent and an ion conductor dispersed in the solvent, the ion conductor including a solid electrolyte and a binder, wherein 0.40<S?/S?<0.80 is satisfied, where S? represents a specific surface area of the solid electrolyte, and S? represents a specific surface area of the ion conductor. For the solid electrolyte composition, 0.45<S?/S?<0.75 may be satisfied.

Abstract: A battery includes: a power generation element having a structure in which battery cells are laminated, each of the battery cells including an electrode layer, a counter electrode layer, and a solid electrolyte layer located between the electrode layer and the counter electrode layer. The power generation element includes a first pair of side surfaces facing each other, and a second pair of side surfaces facing each other and different from the first pair of side surfaces. At least one of the battery cells is provided with a recess where the solid electrolyte layer is receded with respect to the electrode layer and the counter electrode layer on each of the first pair of side surfaces. Surface roughness Rz2 of each of the second pair of side surfaces is smaller than surface roughness Rz1 of each of the first pair of side surfaces.

Abstract: A battery includes battery cells. A battery cell includes a positive electrode active material layer, a negative electrode active material layer, and a solid electrolyte layer disposed between the positive electrode active material layer and the negative electrode active material layer. On a side surface of the battery cell, in a plan view of the side surface of the battery cell, striated cut marks which are inclined with respect to the thickness direction of the battery cell are provided.

Abstract: A battery includes: a power generation element including battery cells each of which includes an electrode layer, a counter-electrode layer, and a solid electrolyte layer located between the electrode layer and the counter-electrode layer, and which are electrically connected in parallel and stacked; an insulating member covering an electrode layer at a side surface of the power generation element; and a terminal electrode covering the side surface and the insulating member, and electrically connected to a counter-electrode layer, in which the power generation element includes: a first parallel unit that includes first battery cells and has both ends in a stacking direction at each of which a counter-electrode layer is located; and a second parallel unit that includes second battery cells, has both ends in the stacking direction at each of which an electrode layers is located, and is stacked on the first parallel unit.

Abstract: A battery includes: a solid-state battery section having at least one power generating element including a first electrode layer, a second electrode layer, and a first solid electrolyte layer positioned between the first electrode layer and the second electrode layer; and a structure including a second solid electrolyte layer having a first principal surface in contact with the at least one power generating element on a side surface of the solid-state battery section and a second principal surface opposite to the first principal surface, and a reference electrode in contact with the second principal surface.

Abstract: A battery includes: a power generation element including a plurality of battery cells each of which includes an electrode layer, a counter-electrode layer, and a solid electrolyte layer located between the electrode layer and the counter-electrode layer, the plurality of battery cells being electrically connected in parallel and stacked; an interlayer located between a pair of two adjacent battery cells; an electrode insulating layer covering an electrode layer among the electrode layers at a first side surface of the power generation element; and a counter-electrode terminal covering the first side surface and the electrode insulating layer, and electrically connected to a counter-electrode layer among the counter-electrode layers.

Abstract: An outer casing includes a housing configured to house a battery, a gas adsorbing unit disposed outside the housing and including an adsorbent that can adsorb a first gas generated inside the housing, and a first valve configured to discharge the first gas from the gas adsorbing unit to outside of the outer casing. The first valve may be connected to the gas adsorbing unit. A battery module includes the outer casing and a battery disposed in the housing of the outer casing.

Abstract: A battery includes an electrode layer, a counter electrode layer, which is a counter electrode for the electrode layer, and a solid electrolyte layer between the electrode layer and the counter electrode layer. The solid electrolyte layer has a first region containing a first solid electrolyte material and a second region containing a second solid electrolyte material. The first region is positioned within a region where the electrode layer and the counter electrode layer face each other. The second region is positioned on an outer peripheral side of the region where the electrode layer and the counter electrode layer face each other, and is in contact with the first region. The first region includes a first projecting portion that projects outward from a region where the electrode layer and the counter electrode layer face each other, and the second region covers the first projecting portion.

Abstract: A battery includes: a power generation element that includes a plurality of unit cells each including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer. The power generation element includes a first side surface and a second side surface, and in the first side surface, first depressions and first projections are arranged alternately, in the second side surface, second depressions and second projections are arranged alternately, each of the first depressions includes a first inclination surface, and each of the second depressions includes a second inclination surface. The battery further includes: a first insulating member arranged in the first depressions; a second insulating member arranged in the second depressions; a first conductive member; and a second conductive member. The positive electrode layers are electrically connected via the first conductive member, and the negative electrode layers are electrically connected via the second conductive member.

Abstract: A battery includes a power generation element that includes a plurality of unit cells each including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer, the unit cells are stacked in a direction normal to a main surface, in a side surface of the power generation element, one electrode layer of the positive electrode layer and the negative electrode layer in each of the unit cells protrudes more than the other electrode layer such that depressions and projections are provided, each of the depressions includes a first inclination surface that is an end surface of the other electrode layer, and the battery further includes: one or more conductive members in contact with a corresponding one of the projections; an insulating member that covers the side surface; and one or more extraction electrodes that are in contact with the one or more conductive members.

Abstract: A battery includes an electrode layer, a counter-electrode layer placed opposite to the electrode layer, and a solid electrolyte layer located between the electrode layer and the counter-electrode layer. The electrode layer includes an electrode collector, an electrode active material layer located between the electrode collector and the solid electrolyte layer, and an electrode-side insulating layer located between the electrode collector and the electrode active material layer at ends of the electrode layer. The counter-electrode layer includes a counter-electrode collector, a counter-electrode active material layer located between the counter-electrode collector and the solid electrolyte layer, and a counter-electrode-side insulating layer located between the counter-electrode collector and the counter-electrode active material layer at ends of the counter-electrode layer.

Abstract: A battery includes a power-generating element having at least one unit cell including an electrode layer, a counter-electrode layer, and an electrolyte layer located between the electrode layer and the counter-electrode layer and an insulating member covering the power-generating element. The insulating member includes a first member that includes a first principal surface covering portion covering a first principal surface of the power-generating element and a second member, joined to the first member, that includes a second principal surface covering portion covering a second principal surface of the power-generating element opposite to the first principal surface. A junction between the first member and the second member overlaps a side surface of the power-generating element when seen from a direction perpendicular to the side surface. An elastic modulus of the first member is higher than an elastic modulus of the second member.

Abstract: A battery includes an electrode layer, a counter electrode layer, which is a counter electrode for the electrode layer, and a solid electrolyte layer between the electrode layer and the counter electrode layer. The solid electrolyte layer has a first region containing a first solid electrolyte material and a second region containing a second solid electrolyte material. The first region is positioned within a region where the electrode layer and the counter electrode layer face each other. The second region is positioned on an outer peripheral side of the region where the electrode layer and the counter electrode layer face each other, and is in contact with the first region. The first region includes a first projecting portion that projects outward from a region where the electrode layer and the counter electrode layer face each other, and the second region covers the first projecting portion.

Abstract: A battery includes an electrode layer, a counter-electrode layer placed opposite to the electrode layer, and a solid electrolyte layer located between the electrode layer and the counter-electrode layer. The electrode layer includes a collector, an electrode active material layer located between the collector and the solid electrolyte layer, and an insulating layer located between the collector and the solid electrolyte layer and bonded to the collector at ends of the electrode layer. The electrode active material layer has a region that does not overlap the insulating layer in plan view. The battery has an air gap, the air gap being located between the collector and the solid electrolyte layer and being contact with the insulating layer.