Mitsubishi Gas Chemical Company, Inc.

National Institute of Advanced Industrial Science and Technology

Tohoku Techno Arch Co., Ltd.

Tomohiro Ito

Aki Katori

Masahiro Shimada

Kotaro Kawakami

Takashi Mukai

Naoto Yamashita

Genki Nogami

Masahiro Yanagida

Shinichi Orimo

Atsushi Unemoto

Keita Noguchi

Yuki Takase

A method for producing a sulfide solid electrolyte includes: forming an Li—P—S homogeneous solution prepared by mixing Li2S and P2S5 with each other in an organic solvent so that the Li2S/P2S5 molar ratio is from 0.7 to 1.5; forming an Li—Si—S homogeneous solution, which contains prepared containing at least elemental lithium (Li), elemental silicon (Si) and elemental sulfur (S) in an organic solvent; mixing a homogeneous mixed solution prepared by mixing the Li—P—S homogeneous solution and the Li—Si—S homogeneous solution with each other; forming a slurry prepared by mixing the homogeneous mixed solution and Li2S with each other; drying a precursor obtained by removing the organic solvent from the slurry; and a heating a sulfide solid electrolyte obtained by heating the precursor at 200-700° C.

Method for producing sulfide solid electrolyte

Provided is a production method for an all-solid-state battery having a solid electrolyte layer between a positive electrode layer and a negative electrode layer, the production method including: coating or impregnating the positive electrode layer and/or the negative electrode layer with a solid electrolyte solution in which a boron hydride compound serving as the solid electrolyte has been dissolved in a solvent; and removing the solvent from the coated or impregnated solid electrolyte solution and causing the solid electrolyte to precipitate on the positive electrode layer and/or the negative electrode layer.

Production method for all-solid-state battery

The present invention is able to provide an LGPS-based solid electrolyte characterized by: satisfying a composition of LiSnPSX(6&#x2264;u&#x2264;14, 0.8&#x2264;v&#x2264;2.1, 9&#x2264;y&#x2264;16, 0&#x3c;z&#x2264;1.6; X represents Cl, Br, or I); and having, in X-ray diffraction (CuK&#x3b1;: &#x3bb;=1.5405 &#x212b;), peaks at least at positions of 2&#x3b8;=19.80&#xb0;&#xb1;0.50&#xb0;, 20.10&#xb0;&#xb1;0.50&#xb0;, 26.60&#xb0;&#xb1;0.50&#xb0;, and 29.10&#xb0;&#xb1;0.50&#xb0;.

LGPS-based solid electrolyte and production method

A method for producing an LGPS-type solid electrolyte can be provided, the method includes preparing a homogeneous solution by mixing and reacting LiS and PSin an organic solution such that the molar ratio of LiS/PSis 1.0-1.85; forming a precipitate by adding, to the homogeneous solution, at least one MS(M is selected from the group consisting of Ge, Si, and Sn) and LiS and then mixing; obtaining a precursor by removing the organic solution from the precipitate; and obtaining the LGPS-type solid electrolyte by heating the precursor at 200-700&#xb0; C.

Method for producing LGPS-based solid electrolyte

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.

Production method for LGPS-based solid electrolyte

The present invention provides a manufacturing method suitable for manufacturing, in large amounts, an ionic conductor that is superior in terms of various properties such as ion conductivity. According to one embodiment of the present invention, provided is a method for manufacturing an ionic conductor, said method including: mixing, using a solvent, LiBHand a lithium halide represented by formula (1), LiX (1) (in formula (1), X represents one selected from the group consisting of halogen atoms); and removing the solvent at 60-280&#xb0; C. Ionic conductors obtained with this manufacturing method can be used as, for example, solid electrolytes for all-solid-state batteries.

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Niigata, Japan

Tomohiro Ito