	US 12,407,015 B2
	Method for producing solid electrolyte powder, and method for producing all solid state battery
Masashi Konya, Niigata (JP); and Kazuki Tamai, Niigata (JP)
Assigned to MITSUBISHI GAS CHEMICAL COMPANY, INC., Tokyo (JP)
Appl. No. 18/285,421
Filed by MITSUBISHI GAS CHEMICAL COMPANY, INC., Tokyo (JP)
PCT Filed Mar. 23, 2022, PCT No. PCT/JP2022/013406 § 371(c)(1), (2) Date Oct. 3, 2023, PCT Pub. No. WO2022/215519, PCT Pub. Date Oct. 13, 2022.
Claims priority of application No. 2021-065249 (JP), filed on Apr. 7, 2021.
Prior Publication US 2024/0194936 A1, Jun. 13, 2024
Int. Cl. H01M 10/0562 (2010.01); C01G 19/00 (2006.01); H01M 10/0525 (2010.01)

CPC H01M 10/0562 (2013.01) [C01G 19/006 (2013.01); H01M 10/0525 (2013.01); C01P 2004/61 (2013.01); C01P 2006/40 (2013.01); H01M 2300/0068 (2013.01)]

14 Claims

1. A method for producing a solid electrolyte powder, which comprises:

preparing a mixed solution by adding a poor solvent to a good solvent solution that comprises a good solvent and a solid electrolyte that comprises an alkali metal element and/or an alkaline earth metal element, Sn and S;

removing at least some of the good solvent from the mixed solution to precipitate solid electrolyte particles; and

drying the solid electrolyte particles to obtain a solid electrolyte powder,

wherein the ratio of the volume of the poor solvent relative to the volume of the good solvent (volume of poor solvent/volume of good solvent) is 5 or more.