Solid electrolyte production method using a multi-axial kneading machine

Patent metadata

Field	Value
Publication number	US-10781101-B2
Application number	US-201615736969-A
Country	US
Kind code	B2
Filing date	Jun 16, 2016
Priority date	Jun 17, 2015
Publication date	Sep 22, 2020
Grant date	Sep 22, 2020

Abstract

The invention provides a method for producing a solid electrolyte, which includes reacting two or more kinds of solid raw materials using a multi-axial kneading machine to give a crystalline solid electrolyte, and which can provide a crystalline solid electrolyte with excellent productivity.

First claim

The invention claimed is:

1. A method for producing a crystalline sulfide solid electrolyte, comprising reacting at least lithium sulfide (Li 2 S) and diphosphorus pentasulfide (P 2 S 3 ) while kneading with a multi-axial kneading machine having reverse screws to crystallize a sulfide solid electrolyte.

2. The method for producing a solid electrolyte according to claim 1 , wherein the reaction is carried out in a solid state.

3. The method for producing a solid electrolyte according to claim 1 , additionally comprising reacting a halogen element while kneading.

4. The method for producing a solid electrolyte according to claim 3 , wherein said halogen element is at least one of bromine and iodine.

5. The method for producing a solid electrolyte according to claim 1 , additionally comprising reacting at least one of lithium bromide and lithium iodide.

6. A method for producing an inorganic material, comprising reacting at least lithium sulfide (Li 2 S) and diphosphorus pentasulfide (P 2 S 5 ) while kneading with a multi-axial kneading machine to crystallize an inorganic material.

7. A multi-axial kneading machine for use in production of a crystalline sulfide solid electrolyte, the production comprising reacting at least lithium sulfide (Li 2 S) and diphosphorus pentasulfide (P 2 S 5 ) while kneading with said multi-axial kneading machine to crystallize a sulfide solid electrolyte, wherein said solid raw materials contain lithium sulfide and disphosphorus pentasulfide.

8. The method for producing a solid electrolyte according to claim 1 , wherein the temperature at the reaction is not lower than the crystallization temperature of the crystal structure of the crystalline solid electrolyte.

9. The method for producing a solid electrolyte according to claim 1 , wherein the temperature at the reaction is 120 to 350° C.

10. The method for producing a solid electrolyte according to claim 1 , wherein the temperature at the reaction is 130 to 320° C.

11. The method for producing a solid electrolyte according to claim 1 , wherein the multi-axial kneading machine has rotary shafts having paddles, screws, and reverse screws.

12. The method for producing a solid electrolyte according to claim 11 , wherein the at least lithium sulfide (Li 2 S) and diphosphorus pentasulfide (P 2 S 5 ) is reacted by the shearing stress generated by the paddles.

Assignees

• Idemitsu Kosan Co

Inventors

• Sato Atsushi
• Senga Minoru
• Aida Masao

Classifications

• H01B13/00

  Apparatus or processes specially adapted for manufacturing conductors or cables · CPC title

• C01B17/22

  Alkali metal sulfides or polysulfides · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• H01M10/0562

  Solid materials · CPC title

• C01D15/04

  Halides · CPC title