Abstract: Provided are: a positive electrode for solid-state batteries, which enables the achievement of high energy density, rate characteristics and durability; a solid-state battery; and a method for producing a solid-state battery. A positive electrode for solid-state batteries, which is provided with a collector and a positive electrode active material layer that contains a positive electrode active material, and which is configured such that: the ratio of the positive electrode active material, which is composed of primary particles, in the positive electrode active material layer is 60% by mass or more; the void fraction in the positive electrode active material layer is less than 20% by volume; and portions of the positive electrode active material layer other than the positive electrode active material, which is composed of primary particles, contain a solid electrolyte.

Abstract: To provide an electrode for a solid-state battery, capable of improving uniformity of electrode materials and suppressing decomposition of a solid electrolyte or an electrode active material by a binder or a solvent. An electrode for a solid-state battery including a solid electrolyte including sulfide and/or oxide, an electrode active material, a binder, and a conductive auxiliary agent, at least one of the solid electrolyte and the electrode active material having a surface being modified with a surface modifying substance, wherein the surface modifying substance is at least one selected from the group consisting of carboxylate, thiocarboxylate, carboxylic acid, thiocarboxylic acid, phosphate ester, thiophosphate ester, ketone, nitrile, alcohol, thiol, and ether.

Abstract: A cell holder (1) for holding a secondary battery cell (9) including a positive electrode active material, a negative electrode active material, and an electrolyte which is disposed between the positive electrode active material and the negative electrode active material and is in contact with both the positive electrode active material and the negative electrode active material, and for outputting power from the secondary battery cell (9), includes a cell holder body (30), and a pressing portion (10) which is supported by the cell holder body (30) and includes a disc spring (11) being in contact with a first end face of the secondary battery cell (9) in a first direction and pressing the first end face of the secondary battery cell (9) in a second direction opposite to the first direction.

Abstract: To provide a positive electrode composite active material particle capable of reducing resistance even when a battery binding force is small or even when a blending amount of positive electrode active material particles is high, and a method for producing the positive electrode composite active material particle, a positive electrode including the positive electrode composite active material particle, and a solid-state battery including the positive electrode. A positive electrode composite active material particle including positive electrode active material particles each made of a lithium-containing oxide and having a surface at least a part of which is coated with a coating material including a sulfide solid electrolyte, and a method for producing the positive electrode composite active material particle, a positive electrode including the positive electrode composite active material particle, and a solid-state battery including the positive electrode.

Abstract: The present invention decreases internal resistance in a solid-state battery having a LiAl system negative electrode mixture. A solid-state battery (1) includes: a positive electrode layer (20), a negative electrode layer (30), and a solid electrolyte layer (40) disposed between the positive electrode layer (20) and negative electrode layer (30), in which the negative electrode layer (30) includes an aluminum layer (31) contacting the solid electrolyte layer (40), and an aluminum-lithium alloy layer (33).

Abstract: The present invention provides: a solid-state battery which is not susceptible to decrease of the discharging capacity even if charge and discharge are repeated; and a method for producing a solid-state battery, which enables the achievement of a good bonded interface between a solid electrolyte layer and a anode layer by a simple process. A solid-state battery 1 according to the present invention is provided with a cathode layer 20, a anode layer 30 and a solid electrolyte layer 40 that is arranged between the cathode layer 20 and the anode layer 30. The anode layer 30 is provided with an aluminum layer 31 that is in contact with the solid electrolyte layer 40, a lithium layer 32, and an aluminum-lithium alloy layer 33 that is arranged between the aluminum layer 31 and the lithium layer 32.

Abstract: Provided are: a positive electrode for solid-state batteries, which enables the achievement of high energy density, rate characteristics and durability; a solid-state battery; and a method for producing a solid-state battery. A positive electrode for solid-state batteries, which is provided with a collector and a positive electrode active material layer that contains a positive electrode active material, and which is configured such that: the ratio of the positive electrode active material, which is composed of primary particles, in the positive electrode active material layer is 60% by mass or more; the void fraction in the positive electrode active material layer is less than 20% by volume; and portions of the positive electrode active material layer other than the positive electrode active material, which is composed of primary particles, contain a solid electrolyte.

Abstract: To provide a negative electrode active material for a solid battery capable of suppressing a micro-short circuit in a solid battery resulting in enabling a yield at the time of manufacturing to be improved, and enhancing an energy density of the resulting solid battery, even when a blending amount of the electrode active material is increased, and a solid electrolyte layer is made to be thin, a negative electrode using the active material, and a solid battery. The physical property and the blending proportion of the negative electrode active material to be used for a negative electrode layer are set to predetermined ranges.

Abstract: A cell holder (1) for holding a secondary battery cell (9) including a positive electrode active material, a negative electrode active material, and an electrolyte which is disposed between the positive electrode active material and the negative electrode active material and is in contact with both the positive electrode active material and the negative electrode active material, and for outputting power from the secondary battery cell (9), includes a cell holder body (30), and a pressing portion (10) which is supported by the cell holder body (30) and includes a disc spring (11) being in contact with a first end face of the secondary battery cell (9) in a first direction and pressing the first end face of the secondary battery cell (9) in a second direction opposite to the first direction.

Abstract: The current collector plate arrangement structure of the bipolar solid-state battery includes a battery cell stack formed by stacking a plurality of solid-state battery cells each including 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 and in contact with the positive electrode active material layer and the negative electrode active material layer. The bipolar solid-state battery includes a positive electrode current collector and a negative electrode current collector on a side surface with respect to a stacking direction. Current collector plates and of the solid-state battery cells are arranged on at least one of a front surface serving as one end surface in the stacking direction and a rear surface serving as the other end surface in the stacking direction.

Abstract: The current collector plate arrangement structure of the bipolar solid-state battery includes a battery cell stack formed by stacking a plurality of solid-state battery cells each including 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 and in contact with the positive electrode active material layer and the negative electrode active material layer. The bipolar solid-state battery includes a positive electrode current collector and a negative electrode current collector on a side surface with respect to a stacking direction. Current collector plates and of the solid-state battery cells are arranged on at least one of a front surface serving as one end surface in the stacking direction and a rear surface serving as the other end surface in the stacking direction.