US 12,469,874 B2
Solid electrolyte body, all-solid-state battery, method for producing solid electrolyte body, and method for producing all-solid-state battery
Masaki Yanagawa; Akira Hatakeyama, Miyagi (JP); and Hitoshi Takamura, Miyagi (JP)
Assigned to Japan Fine Ceramics Co., Ltd., Miyagi (JP)
Appl. No. 16/964,438
Filed by JAPAN FINE CERAMICS CO., LTD., Sendai (JP)
PCT Filed Feb. 7, 2019, PCT No. PCT/JP2019/004495
§ 371(c)(1), (2) Date Jul. 23, 2020,
PCT Pub. No. WO2019/156187, PCT Pub. Date Aug. 15, 2019.
Claims priority of application No. 2018-021439 (JP), filed on Feb. 8, 2018.
Prior Publication US 2021/0050622 A1, Feb. 18, 2021
Int. Cl. H01M 4/80 (2006.01); H01M 10/0562 (2010.01)
CPC H01M 10/0562 (2013.01) [H01M 4/80 (2013.01); H01M 2300/0074 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for producing a solid electrolyte body which includes a porous body composed of a first ceramic containing an electrolyte that does not contain lithium ion and a thin membrane-shaped dense body composed of a second ceramic containing a lithium ion solid electrolyte and integrally formed with at least a part of a surface of the porous body,
wherein the method comprises:
a step of preparing the porous body by preparing a first molded body and firing the first molded body; and
a step of preparing a thin membrane-shaped second molded body of the ceramics on at least a part of the surface of the porous body, and preparing the thin membrane-shaped dense body by firing the second molded body,
wherein the porous body includes larger structural particles of the first ceramic and smaller structural particles of the first ceramic dispersed throughout the porous body in a thickness direction and plane direction;
some of the larger structure particles of the first ceramic and some of the smaller structure particles of the first ceramic of which the porous body is composed are partially embedded in the thin membrane-shaped dense body over an entire bonding interface between the dense body and said at least part of the surface of the porous body with which the dense body is integrally formed, and
the first ceramic and the second ceramic are the same.