US2018166740A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018166740-A1 |
| Application number | US-201715798557-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 31, 2017 |
| Priority date | Dec 9, 2016 |
| Publication date | Jun 14, 2018 |
| Grant date | — |
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Provided is a method of producing a sulfide solid electrolyte with which the capacity retention of an all-solid-state battery can be improved. The method of producing a sulfide solid electrolyte comprises synthesizing material for a sulfide solid electrolyte from raw material for an electrolyte; and after said synthesizing, heating the material for a sulfide solid electrolyte in a flow of a gas at a temperature of no less than a melting point of elemental sulfur, the gas being able to form a chemical bond with the elemental sulfur.
Opening claim text (preview).
What is claimed is: 1 . A method of producing a sulfide solid electrolyte, the method comprising: synthesizing material for a sulfide solid electrolyte from raw material for an electrolyte; and after said synthesizing, heating the material for a sulfide solid electrolyte in a flow of a gas at a temperature of no less than a melting point of elemental sulfur, the gas being able to form a chemical bond with the elemental sulfur. 2 . The method of producing a sulfide solid electrolyte according to claim 1 , wherein the gas is a H 2 S gas. 3 . The method of producing a sulfide solid electrolyte according to claim 1 , further comprising: washing a sulfide solid electrolyte with an organic solvent, the sulfide solid electrolyte being obtained after said heating in the flow of the gas. 4 . The method of producing a sulfide solid electrolyte according to claim 1 , wherein the raw material for an electrolyte contains at least Li 2 S, and one or more sulfide(s) selected from P 2 S 3 , P 2 S 5 , SiS 2 , GeS 2 , B 2 S 3 and Al 2 S 3 , the method further comprising heat-treating the sulfides prior to said synthesizing. 5 . The method of producing a sulfide solid electrolyte according to claim 4 , wherein the raw material for an electrolyte contains at least Li 2 S and P 2 S 5 . 6 . The method of producing a sulfide solid electrolyte according to claim 1 , the method further comprising: after said synthesizing and prior to said heating in the flow of the gas, pulverizing the material for a sulfide solid electrolyte. 7 . The method of producing a sulfide solid electrolyte according to claim 1 , wherein in said heating in the flow of the gas, the material for a sulfide solid electrolyte is heated at a temperature of no less than a crystallization temperature of the material for a sulfide solid electrolyte, to obtain a sulfide solid electrolyte of glass ceramics.
Construction or manufacture · CPC title
Solid materials · CPC title
inorganic · CPC title
of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
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