METHOD FOR PREPARING SOLID ELECTROLYTE, SOLID ELECTROLYTE PREPARED THEREBY, AND ALL-SOLID-STATE BATTERY COMPRISING SAME

Title:

METHOD FOR PREPARING SOLID ELECTROLYTE, SOLID ELECTROLYTE PREPARED THEREBY, AND ALL-SOLID-STATE BATTERY COMPRISING SAME

Document Type and Number:

WIPO Patent Application WO/2022/154428

Kind Code:

A1

Abstract:

The present invention relates to a method for preparing an alkali-metal-ion-conductive chalcogenide-based solid electrolyte, a solid electrolyte prepared thereby, and an all-solid-state battery comprising same. The technical subject matter of the present invention comprises the steps of: reacting, in a polar aprotic solvent, an alkali-metal-containing material, a transfer catalyst ionizing an alkali metal to transfer ions and electrons, and an alkali-metal-ion-conductive chalcogenide-based solid electrolyte material comprising a compound of a chalcogen and at least one element of groups 2-15 and 17 of the periodic table, thereby preparing a precursor solution in which an alkali-metal-ion-conductive chalcogenide-based solid electrolyte precursor, formed by means of an alkali metal polychalcogenide generated by the transfer of an ion and an electron from the alkali-metal-containing material to the chalcogen, is present while suspended, dissolved or combined with same; recovering, in a powder form, an alkali-metal-ion-conductive chalcogenide-based solid electrolyte precursor from the precursor solution; and heat treating the alkali-metal-ion-conductive chalcogenide-based solid electrolyte precursor powder.

Inventors:

HA YOON CHEOL (KR)
LEE SANG MIN (KR)
KIM BYUNG GON (KR)
PARK GUM JAE (KR)
PARK JUN WOO (KR)
PARK JUN HO (KR)
YU JI HYUN (KR)
LEE WON JAE (KR)
LEE YOU JIN (KR)
CHOI HAE YOUNG (KR)

Application Number:

PCT/KR2022/000464

Publication Date:

July 21, 2022

Filing Date:

January 11, 2022

Export Citation:

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Assignee:

KERI KOREA ELECTROTECHNOLOGY RES INST (KR)

International Classes:

C01B25/14; H01M10/0562

Domestic Patent References:

WO2020105736A1

2020-05-28

Foreign References:

CN110867606A	2020-03-06
KR20200003929A	2020-01-10
KR20190058467A	2019-05-29
JP2020119783A	2020-08-06

Attorney, Agent or Firm:

PUKYUNG INTERNATIONAL PATENT & LAW FIRM (KR)

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