Method for manufacturing ionic conductor

Patent metadata

Field	Value
Publication number	US-10825574-B2
Application number	US-201716069439-A
Country	US
Kind code	B2
Filing date	Jan 13, 2017
Priority date	Jan 18, 2016
Publication date	Nov 3, 2020
Grant date	Nov 3, 2020

Abstract

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, LiBH4 and 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° C. Ionic conductors obtained with this manufacturing method can be used as, for example, solid electrolytes for all-solid-state batteries.

First claim

The invention claimed is:

1. A method for manufacturing a crystallized solid electrolyte ionic conductor, said method including:
adding LiBH 4 to a solvent comprising a lithium halide; or adding a lithium halide to a solvent comprising LiBH 4 ; or adding LiBH 4 and a lithium halide, as separate compositions, to a solvent;
mixing, in the solvent, the LiBH 4 and the lithium halide, wherein the lithium halide is represented by formula (1):
LiX  (1)

wherein X represents one selected from the group consisting of halogen atoms; and
removing the solvent at 60 to 280° C.;
wherein the lithium halide has a water content of 50 to 26000 ppm;
wherein crystallization of the crystallized solid electrolyte ionic conductor is performed by heating the crystallized solid electrolyte ionic conductor at a temperature of 50° C. to 300° C.; and
wherein the crystallized solid electrolyte ionic conductor has diffraction peaks at least 2θ=23.9±1.2 deg, 25.6±1.5 deg, 27.3±1.5 deg, 35.4±2.0 deg and 42.2±2.0 deg in X-ray diffraction (CuKα: λ=1.5405 Å).

2. The method for manufacturing the crystallized solid electrolyte ionic conductor according to claim 1 , wherein the solvent is an ether-based solvent.

3. The method for manufacturing the crystallized solid electrolyte ionic conductor according to claim 2 , wherein the ether-based solvent is selected from tetrahydrofuran, 2-methyltetrahydrofuran and cyclopentyl methyl ether.

Assignees

• Mitsubishi Gas Chemical Co
• Tohoku Techno Arch Co Ltd

Inventors

• Shimada Masahiro
• Ito Tomohiro
• Katori Aki
• UNEMOTO Atsushi
• Orimo Shinichi

Classifications

• H01M6/18 Primary

  with solid electrolyte · CPC title

• C01D15/04

  Halides · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01B1/20

  Conductive material dispersed in non-conductive organic material {(organic macromolecular compounds or compositions C08)} · CPC title

• H01B1/06

  mainly consisting of other non-metallic substances · CPC title