Hyundai Motor Company

Industry-university Cooperation Foundation Hanyang University

Solivis Inc.

Min Yong Eom

Dong Wook Shin

Chan Hwi Park

Kyoung Jin Jeong

Sun Choi

Jung Hoon Kim

Hee Yeon Ryu

Sam Ick Son

Ju Young Sung

Seung Hyun Oh

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 LiS with PSto 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.

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

A method for manufacturing a positive active material for an all-solid Lithium-Sulfur battery includes preparing a lithium sulfide solution by dissolving lithium sulfide in anhydrous ethanol. A mixture is prepared by mixing a carbon fiber to the lithium sulfide solution. A lithium sulfide-carbon fiber composite is prepared by drying the mixture of the carbon fiber and the lithium sulfide solution to deposit the lithium sulfide on a surface of the carbon fiber. The lithium sulfide-carbon fiber composite is heated at 400 to 600&#xb0; C.

Method for manufacturing positive active material for all-solid lithium-sulfur battery

A method of preparing a positive electrode active material-solid electrolyte complex for an all-solid-state lithium sulfur battery includes mixing a sulfide based solid electrolyte, which includes LiS and PS, and a positive electrode active material to prepare a mixture; milling the mixture to amorphize the mixture; and heat-treating the amorphized mixture.

Method of preparing positive electrode active material-solid electrolyte complex for all-solid-state lithium sulfur battery

A sulfide-based crystallized glass for an all-solid secondary battery has a sulfide that includes LiS and PS, wherein the sulfide-based crystallized glass consists of 1 to 5% by mole of LiBO. A method for manufacturing the sulfide-based crystallized glass comprises steps of mixing (1) 75 to 80% by mole of LiS and 20 to 25% by mole of PS, and then mixing (2) 95 to 99% by mole of obtained mixture at (1) and 1 to 5% by mole of LiBOwith a mechanical milling method, and subjecting the mixture thus obtained to a heat-treatment process.

Sulfide-based crystallized glass for all-solid secondary battery and a method for manufacturing the same

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Seoul, South Korea

Min Yong Eom