Mitsubishi Gas Chemical Company, Inc.

National Institute of Advanced Industrial Science and Technology

Tohoku Techno Arch Co., Ltd.

Aki Katori

Masahiro Shimada

Tomohiro Ito

Kotaro Kawakami

Takashi Mukai

Naoto Yamashita

Genki Nogami

Masahiro Yanagida

Keita Noguchi

Shinichi Orimo

Atsushi Unemoto

Yuki Takase

The present invention is able to provide a method for producing an all-solid-state battery that has a solid electrolyte layer between a positive electrode layer and a negative electrode layer. This method for producing an all-solid-state battery is characterized by comprising: a step wherein a coating liquid is applied to at least one of the positive electrode layer and the negative electrode layer, said coating liquid containing a solid electrolyte solution, which is obtained by dissolving a solid electrolyte in a solvent, and fine particles which are insoluble in the solid electrolyte solution; and a step wherein the solvent is removed from the applied coating liquid, thereby having the solid electrolyte deposit on at least one of the positive electrode layer and the negative electrode layer.

Method for producing all-solid-state battery

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

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 can provide a production method for a solid electrolyte having LiPS, said method characterized by including: a solution-making step in which a homogenous solution is prepared by mixing LiS and PSinto an organic solvent; and a precipitation step in which further LiS is added to and mixed in the homogenous solution and a precipitate is formed. Preferably, the embodiment either has a molar ratio (LiS/PS) between the LiS and the PSin the solution-making step of 1.0-1.85 or has further LiS added to the homogenous solution in the precipitation step such that the molar ratio becomes LiS/PS=2.7-3.3.

Production method for solid electrolyte having Li3PS4

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

Aki Katori