Abstract: The present invention relates to a method for preparing a sulfide-based solid electrolyte, a sulfide-based solid electrolyte prepared by the method, and an all-solid-state lithium secondary battery including the sulfide-based solid electrolyte. The method of the present invention includes a) mixing Li2S with P2S5 to prepare a mixed powder, b) placing the mixed powder, an ether, and stirring balls in a container, sealing the container, followed by stirring to prepare a suspension, and c) stirring the suspension under high-temperature and high-pressure conditions to prepare sulfide-based solid particles.
Type:
Grant
Filed:
February 15, 2017
Date of Patent:
February 27, 2024
Assignee:
SOLIVIS INC.
Inventors:
Dong Wook Shin, Min Yong Eom, Seung Hyun Oh, Chan Hwi Park, Sun Ho Choi
Abstract: A method of manufacturing an argyrodite-type solid electrolyte, an argyrodite-type solid electrolyte, and an all-solid-state battery including the argyrodite-type solid electrolyte are provided. The method includes a first step of adding precursors represented by the following Formulas 1 and 2 into a polar aprotic solvent, followed by stirring to obtain a reaction solution; a second step of adding P2S5 into the stirred reaction solution, followed by further stirring to form a precipitate obtained as a result of the reaction in the reaction solution; and a third step of drying and heat-treating the reaction solution in which the precipitate is formed to obtain a solid electrolyte: [Formula 1] A2S [Formula 2] AX wherein A represents an alkali metal, and X represents an element of the halogen group.
Type:
Grant
Filed:
February 2, 2021
Date of Patent:
December 26, 2023
Assignee:
SOLIVIS INC.
Inventors:
Dong Wook Shin, Sun Ho Choi, Chan Hwi Park, Ji Yae Do, Seungwoo Lim, Gi Deok Kim