Abstract: Positive electrode layer 20 is used for an all-solid-state battery. Positive electrode layer 20 includes positive electrode active material 2 and solid electrolyte 1. A filling rate of positive electrode layer 20 is 85% or more. A porosity of positive electrode active material 2 is 5% or less.

Abstract: A powder layer composite includes a base and a powder layer having a thickness of 100 ?m or less and disposed on the base. An average of a total value of a number of powder aggregates having a long diameter of 500 ?m or greater and a number of pinholes having a long diameter of 500 ?m or greater, in any of a plurality of different regions of 20 mm×20 mm on a surface of the powder layer, is 0.2 pieces/cm2 or less.

Abstract: A solid-state battery that exhibits improved battery performance includes: a positive-electrode collector; a negative-electrode collector; a positive electrode layer formed on the positive-electrode collector and containing a positive-electrode active material and a solid electrolyte; a negative electrode layer formed on the negative-electrode collector and containing a negative-electrode active material and a solid electrolyte; and a solid electrolyte layer disposed between the positive electrode layer and the negative electrode layer and containing a solid electrolyte. At least one of the solid electrolyte and the solid electrolyte partly represents a porous solid electrolyte.

Abstract: A powder application apparatus includes a transport device, a powder supplier, a squeegee, and an ultra-high frequency vibration generator. The transport device is configured to move a sheet in a predetermined direction. The powder supplier is configured to supply powder on a surface of the sheet. The squeegee is positioned at a distance from the sheet, and the powder supplier is configured to adjust a thickness of the powder supplied onto the surface of the sheet. The ultra-high frequency vibration generator is configured to vibrate the squeegee at a frequency of 2 kHz or more and 300 kHz or less.

Abstract: A powder layer composite includes a base and a powder layer having a thickness of 100 ?m or less and disposed on the base. An average of a total value of a number of powder aggregates having a long diameter of 500 ?m or greater and a number of pinholes having a long diameter of 500 ?m or greater, in any of a plurality of different regions of 20 mm×20 mm on a surface of the powder layer, is 0.2 pieces/cm2 or less.

Abstract: An all-solid battery has a structure in which a cathode current collector, a cathode layer that contains cathode active materials constituted by a plurality of particles and solid electrolytes constituted by a plurality of particles, a solid-electrolyte layer that contains solid electrolytes, an anode layer that contains anode active materials and solid electrolytes, and an anode current collector are stacked in this order. The cathode layer includes a region where the plurality of particles constituting the solid electrolytes are filled or continuously densely packed in a sliced surface in a case where an end of the cathode layer is sliced, and a distance between two adjacent particles having a positional relationship across the region among the plurality of particles constituting the cathode active material is 2 times or more than an average particle size of the cathode active materials.

Abstract: A powder coating device including: a powder feeder that feeds powder onto a surface of a base material; a squeegee that is disposed to form a gap with respect to the base material and has a surface in contact with the powder fed onto the surface of the base material, the squeegee being configured to adjust a thickness of a powder layer composed of the powder fed onto the surface of the base material by the powder feeder and move relative to the base material in a state where an inclination angle of the surface of the squeegee with respect to a normal direction of the surface of the base material is changeable; a powder inclination angle detector that detects an angle between a surface of the powder layer and the base material; anda first controller that adjusts the inclination angle of the surface of the squeegee in contact with the powder based on the inclination angle of the powder layer detected by the powder inclination angle detector.

Abstract: A squeegee is to be relatively moved in a certain direction while a desired gap is being formed with respect to a base material to uniformly level a thickness of a powder layer including powder supplied on the base material, and includes: a first portion that vibrates in contact with the powder on an upstream side of a relative movement direction of the base material with respect to the squeegee; and a second portion that vibrates in contact with the powder on a downstream side of the relative movement direction of the base material with respect to the squeegee, a vibration direction of the first portion being different from a vibration direction of the second portion.

Abstract: An electrode includes a collector, and an active material mixture layer located on the collector and containing first particles, second particles, first active material particles, and second active material particles. The active material mixture layer includes a first mixture layer located on the collector and containing the first particles and the first active material particles, and a second mixture layer located on the first mixture layer and containing the second particles and the second active material particles. The active material mixture layer has a boundary in which the first active material particles and the second active material particles are in contact with each other in a discontinuous state at least in part, in a cross-sectional view of the electrode.

Abstract: A negative electrode active substance is used for a negative electrode layer of an all-solid battery and contains a plurality of secondary particles. The plurality of secondary particles contain impregnated particles which are secondary particles having a polymer solid electrolyte region impregnated with the polymer solid electrolyte therein and an active material region.

Abstract: An all-solid battery is formed by laminating a first current collector, a positive-electrode layer, a solid electrolyte layer, a negative-electrode layer, and a second current collector in this order. The positive-electrode fine particle layer contains positive-electrode active material fine particles having a particle diameter smaller than that of the positive-electrode active material and is formed on a side surface of the positive-electrode layer. The negative-electrode fine particle layer contains negative-electrode active material fine particles having a particle diameter smaller than that of the negative-electrode active material and is formed on a side surface of the negative-electrode layer.

Abstract: A powder layer composite includes a current collector, and a powder layer formed on the current collector and having a film thickness of 50 ?m or more. The powder layer contains a powder made of at least one type of particle material. A concentration of a solvent contained in the powder layer is 50 ppm or less. A variation in a weight per unit area of the powder layer is 10% or less in an optional region with 30 mm×30 mm in the powder layer.

Abstract: An all-solid-state battery has a structure including a positive electrode current collector; a positive electrode layer containing a positive electrode active material, a first solid electrolyte, a second solid electrolyte, and a conductive fiber; a solid electrolyte layer containing a fourth solid electrolyte; a negative electrode layer containing a negative electrode active material and a third solid electrolyte; and a negative electrode current collector. These are stacked in this order. The positive electrode layer includes: a fiber-containing region that coats the positive electrode active material and that contains the conductive fiber and the first solid electrolyte; and a fiber-free region that is located in a gap surrounded by the positive electrode active material coated by the fiber-containing region. The fiber-free region is free of the conductive fiber, and contains the second solid electrolyte.

Abstract: A positive electrode layer is to be used in an all-solid-state battery, and includes a positive electrode current collector; a positive electrode junction layer including at least a conductive agent and disposed on the positive electrode current collector; and a positive electrode material mixture layer disposed on the positive electrode junction layer and including at least a positive electrode active material including a plurality of particles, a solid electrolyte having ion conductivity, and a plurality of conductive fibers. The plurality of conductive fibers include a conductive fiber that is positioned to connect adjacent particles of the positive electrode active material. A concentration of a binder included in the positive electrode material mixture layer is 100 ppm or less, and a concentration of a solvent included in the positive electrode material mixture layer is 50 ppm or less.

Abstract: An all-solid-state battery has a structure in which a positive electrode current collector, a positive electrode layer containing a positive electrode active material and a solid electrolyte, a solid electrolyte layer containing a solid electrolyte, a negative electrode layer containing a negative electrode active material and a solid electrolyte, and a negative electrode current collector are stacked in this order. The solid electrolyte layer has a repeating structure in which a low porosity portion and a high porosity portion having a higher porosity than a porosity of the low porosity portion are repeated in an in-plane direction.

Abstract: An all-solid-state battery includes: a positive electrode layer including a positive electrode current collector and a positive electrode mixture layer; a negative electrode layer including a negative electrode current collector and a negative electrode mixture layer; and a solid electrolyte layer. The solid electrolyte layer is disposed between the positive electrode mixture layer and the negative electrode mixture layer. A weight per unit area of a first portion of the negative electrode mixture layer overlapping the positive electrode mixture layer on a stacking axis is greater than a weight per unit area of a second portion of the negative electrode mixture layer not overlapping the positive electrode mixture layer on the stacking axis.

Abstract: An all-solid battery includes a positive-electrode layer, a negative-electrode layer, and a solid electrolyte layer. The positive-electrode layer includes a positive-electrode current collector, a positive-electrode bonding layer containing at least a conductive agent comprising non-metal and formed on the positive-electrode current collector, and a positive-electrode mixture layer containing at least a positive-electrode active material and a solid electrolyte and formed on the positive-electrode bonding layer. The negative-electrode layer includes a negative-electrode current collector and a negative-electrode mixture layer containing at least a negative-electrode active material and the solid electrolyte. The solid electrolyte layer is disposed between the positive-electrode mixture layer and the negative-electrode mixture layer and contains the solid electrolyte.

Abstract: A negative electrode active substance is used for a negative electrode layer of an all-solid battery and contains a plurality of secondary particles. The plurality of secondary particles contain impregnated particles which are secondary particles having a polymer solid electrolyte region impregnated with the polymer solid electrolyte therein and an active material region.

Abstract: An all-solid-state battery includes: a positive electrode layer including a positive electrode current collector and a positive electrode mixture layer; a negative electrode layer including a negative electrode current collector and a negative electrode mixture layer; and a solid electrolyte layer. The solid electrolyte layer is disposed between the positive electrode mixture layer and the negative electrode mixture layer. On a plane perpendicular to a stacking axis, an area of the negative electrode mixture layer is larger than an area of the positive electrode mixture layer. On the stacking axis, an entire portion of the positive electrode mixture layer overlaps a portion of the negative electrode mixture layer.

Abstract: Positive electrode layer 20 is used for an all-solid-state battery. Positive electrode layer 20 includes positive electrode active material 2 and solid electrolyte 1. A filling rate of positive electrode layer 20 is 85% or more. A porosity of positive electrode active material 2 is 5% or less.