Honda Motor Co., Ltd.

Ushio Harada

Toru Sukigara

Hiroto Maeyama

Sokichi Okubo

Noriaki Kamaya

Atsushi Ogawa

Kazuki Chiba

Yuji Saito

Masahiro Ohta

Hiroshi Ichikawa

Tadashi Tsunoda

Yoshikatsu Higuchi

Wataru Shimizu

Soshi Kawamura

Teruaki Komiya

Akihiro Yoshizawa

Mari Maruyama

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

All-solid-state battery and method of producing all-solid-state battery

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. The present invention also provides: a solid-state battery which comprises this positive electrode for solid-state batteries; and a method for producing this solid-state battery.

Positive electrode for solid-state batteries, solid-state battery and method for producing solid-state battery

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 &#x3bc;m or more and less than 20 &#x3bc;m.

Solid electrolyte sheet and solid state battery

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.

Solid electrolyte laminated sheet and solid state battery

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.

Method for manufacturing solid-state battery and solid-state battery

A cell holder () for holding a secondary battery cell () 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 (), includes a cell holder body (), and a pressing portion () which is supported by the cell holder body () and includes a disc spring () being in contact with a first end face of the secondary battery cell () in a first direction and pressing the first end face of the secondary battery cell () in a second direction opposite to the first direction.

Cell holder

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.

Current collector plate arrangement structure of bipolar solid-state battery

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.

Method of, apparatus for, and program for inspecting stack body

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 &#x3bc;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.

Growing community of inventors

Wako, Japan

Ushio Harada