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: Provided is a solid electrolyte sheet having a self-supporting property while having a small thickness and flexibility. The solid electrolyte sheet is formed using a support having a specific porosity and a specific thickness. Specifically, the solid electrolyte sheet is formed in which a solid electrolyte is filled in a support having a porosity of 60% or more and 95% or less and a thickness of 5 ?m or more and less than 20 ?m.

Abstract: Provided is a solid electrolyte laminated sheet having a self-supporting property and capable of realizing a solid state battery having high output characteristics. A plurality of supports are used, a solid electrolyte is filled in each support to form a self-supporting sheet, and the self-supporting sheets are superimposed to form a solid electrolyte laminated sheet. Specifically, the solid electrolyte laminated sheet is configured by setting a layer of the solid electrolyte laminated sheet in contact with a positive electrode layer being the outermost layer as a self-supporting sheet in which a solid electrolyte resistant to oxidation is filled, and a layer in contact with a negative electrode layer being the opposite outermost layer as a self-supporting sheet in which a solid electrolyte resistant to reduction is filled.

Abstract: An all-solid-state battery (1) includes a positive electrode (20) in which a first current collector layer (21) and a first active material layer (22) containing at least a solid electrolyte are laminated, a negative electrode (30) in which a second current collector layer (31) and a second active material layer (32) containing at least a solid electrolyte are laminated, and a first solid electrolyte layer (41) disposed between the first active material layer (22) and the second active material layer 32. In a direction perpendicular to a lamination direction, an area of the second active material layer (32) in the negative electrode (30) is larger than an area of the first active material layer (22) in the positive electrode (20), and in a direction perpendicular to the lamination direction, an area of the first solid electrolyte layer (41) is larger than an area of the first active material layer (22) in the positive electrode (20), and the porosity n1am of the first active material layer (22) is 5% or less.

Abstract: A method for manufacturing a solid-state battery includes: an electrode material filling step of filling a plurality of holes of a porous conductive base material with an active material contained in an electrode slurry so as to form a first electrode body, by dipping the porous conductive base material having the plurality of holes into the electrode slurry; a solid electrolyte material coating step of coating a surface with a solid electrolyte material contained in a solid-electrolyte slurry by dipping at least one of the first electrode body or a second electrode body having a polarity different from that of the first electrode body into the solid-electrolyte slurry; and a solid-state battery laminating step of obtaining a solid-state battery by laminating and pressing the first electrode body and the second electrode body.

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 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: A method for manufacturing a solid-state battery includes: an electrode material filling step of filling a plurality of holes of a porous conductive base material with an active material contained in an electrode slurry so as to form a first electrode body, by dipping the porous conductive base material having the plurality of holes into the electrode slurry; a solid electrolyte material coating step of coating a surface with a solid electrolyte material contained in a solid-electrolyte slurry by dipping at least one of the first electrode body or a second electrode body having a polarity different from that of the first electrode body into the solid-electrolyte slurry; and a solid-state battery laminating step of obtaining a solid-state battery by laminating and pressing the first electrode body and the second electrode body.

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 disclosure provides an electrode for solid state battery and a solid state battery, wherein the electrode using a foamed metal as a collector has excellent mechanical strength and can maintain the insulation from a counter electrode when constituting the solid state battery. In the electrode for solid state battery, which uses a collector composed of a foamed porous body that has a mesh structure, a layer that achieves reinforcement and insulation is provided in the boundary between a filled part filled with an electrode mixture and an unfilled part.

Abstract: Provided is a solid electrolyte laminated sheet having a self-supporting property and capable of realizing a solid state battery having high output characteristics. A plurality of supports are used, a solid electrolyte is filled in each support to form a self-supporting sheet, and the self-supporting sheets are superimposed to form a solid electrolyte laminated sheet. Specifically, the solid electrolyte laminated sheet is configured by setting a layer of the solid electrolyte laminated sheet in contact with a positive electrode layer being the outermost layer as a self-supporting sheet in which a solid electrolyte resistant to oxidation is filled, and a layer in contact with a negative electrode layer being the opposite outermost layer as a self-supporting sheet in which a solid electrolyte resistant to reduction is filled.

Abstract: The disclosure provides an electrode for solid state battery, a solid state battery, and a manufacturing method of the electrode for solid state battery. The electrode for solid state battery uses a foamed porous body as the collector. When the electrode constitutes the solid state battery, the obtained battery has low resistance, high battery capacity per unit area, and high output. A collector composed of a foamed porous body is filled with an electrode mixture by differential pressure filling to obtain an electrode, in which the content rate of an organic polymer compound is low.

Abstract: Provided is a solid electrolyte sheet having a self-supporting property while having a small thickness and flexibility. The solid electrolyte sheet is formed using a support having a specific porosity and a specific thickness. Specifically, the solid electrolyte sheet is formed in which a solid electrolyte is filled in a support having a porosity of 60% or more and 95% or less and a thickness of 5 ?m or more and less than 20 ?m.

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: A manufacturing method of solid-state battery capable of more effectively preventing a short circuit between electrode layers is provided. The manufacturing method of a solid-state battery 1 includes: a laminate pressing process for pressing a laminate 10a in which a positive electrode layer 11a, a negative electrode layer 13a, and a solid electrolyte layer 12a between the positive electrode layer 11a and the negative electrode layer 13a are laminated; and a shearing process for punching the laminate 10a into a prescribed shape by shearing to form a plurality of single battery components 10.

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: A method of inspecting a stack body of at least a porous layer and a dense layer comprises the first step of measuring the length of the stack body before the stack body is fired, the second step of measuring the length of the stack body after the stack body is fired, the third step of calculating a shrinkage rate of the stack body based on a first measured value from the first step and a second measured value from the second step, the fourth step of determining whether the calculated shrinkage rate of the stack body is acceptable or not based on the calculated shrinkage rate, the fifth step of calculating an S/N ratio of the stack body based on the first measured value and the second measured value, and the sixth step of determining whether the current-voltage characteristics of the stack body are acceptable or not based on the calculated S/N ratio.

Abstract: A free-standing membrane electrolyte electrode assembly (ESC) comprises an electrolyte, an anode electrode formed at one end face of the electrolyte, and a cathode electrode formed at the other. The electrolyte is a single crystal having a surface along with oxide ions move or a direction in which the ions move or a polycrystal oriented along a surface along which oxide ions move or in a direction in which the ions move. The surface or the direction is parallel to the thickness direction. The thickness of the electrolyte is 50 to 800 ?m and the quotient of the division of the total thickness of the anode electrode and the cathode electrode by the thickness of the electrolyte is 0.1 or less,. The thickness of the ESC is 1 mm or less.

Abstract: A solid oxide fuel cell is provided having a ceria-based bulk electrolyte layer, an interface layer, an anode and a cathode, where the ceria-based bulk electrolyte layer is disposed between the cathode and the interface layer, and the interface layer is disposed between the ceria-based bulk electrolyte layer and the anode. Use of the ceria-based bulk electrolyte layer and an interface layer between the bulk layer and the anode takes advantage of the properties of a Ceria-based electrolyte without reducing to Ce (III) when operating the SOFC at the prescribed temperatures. The ceria-based bulk electrolyte layer has a thickness in a range of 10 nm to 500 um, and the interface layer has a thickness in a range of 1 angstrom to 50 nm.