	US 11,916,186 B2
	Method for preparing sulfide-based solid electrolyte, sulfide-based solid electrolyte prepared by the method and all-solid-state lithium secondary battery including the sulfide-based solid electrolyte
Dong Wook Shin, Seongnam-si (KR); Min Yong Eom, Seoul (KR); Seung Hyun Oh, Hanam-si (KR); Chan Hwi Park, Seoul (KR); and Sun Ho Choi, Incheon (KR)
Assigned to SOLIVIS INC., Seoul (KR)
Appl. No. 16/077,928
Filed by SOLIVIS INC., Seoul (KR)
PCT Filed Feb. 15, 2017, PCT No. PCT/KR2017/001624 § 371(c)(1), (2) Date Aug. 14, 2018, PCT Pub. No. WO2017/142295, PCT Pub. Date Aug. 24, 2017.
Claims priority of application No. 10-2016-0017049 (KR), filed on Feb. 15, 2016.
Prior Publication US 2021/0194044 A1, Jun. 24, 2021
Int. Cl. H01M 10/00 (2006.01); H01M 10/0525 (2010.01); H01M 10/0562 (2010.01)

CPC H01M 10/0562 (2013.01) [H01M 10/0525 (2013.01); H01M 2300/0068 (2013.01)]

11 Claims

1. A method for preparing a sulfide-based solid electrolyte, comprising

a) mixing at least one of SiS₂, GeS₂, B₂S₃, Al₂S₃, TiS₂and P₂S₅with Li₂S to prepare a mixed powder,

b) placing the mixed powder, an ether, and stirring balls in a first container, sealing the container, followed by stirring to prepare a suspension, wherein the at least one of SiS₂, GeS₂, B₂S₃, Al₂S₃, TiS₂and P₂S₅with Li₂S particles of the mixed powder are uniformly distributed in the suspension,

c) placing the suspension in a second container and stirring the suspension under synthesis temperature and synthesis pressure conditions to synthesize sulfide-based solid particles, and

d) separating the sulfide-based solid particles from the suspension and drying the sulfide-based solid particles at 130° C. to 170° C. for 1 hour to 5 hours,

wherein step c) is carried out at a temperature of 150° C. to 200° C. and a vapor pressure of 1 bar to 5 bars for 20 hours to 30 hours.