Mitsubishi Gas Chemical Company, Inc.

Yuki Takase

Aki Katori

Tomohiro Ito

Masahiro Shimada

Kotaro Kawakami

The present invention provides an LGPS-based solid electrolyte production method characterized by having a step in which a mixture of LiPScrystals having a peak at 420&#xb1;10 cmin a Raman measurement and LiMScrystals (M being selected from the group consisting of Ge, Si, and Sn) is heat treated at 300-700&#xb0; C. In addition, the present invention can provide an LGPS-based solid electrolyte production method characterized by having: a step in which LiPScrystals having a peak at 420&#xb1;10 cmin a Raman measurement, LiS crystals, and sulfide crystals indicated by MS(M being selected from the group consisting of Ge, Si, and Sn) are mixed while still having crystals present and a precursor is synthesized; and a step in which the precursor is heat treated at 300-700&#xb0; C.

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Tokyo, Japan

Yuki Takase