US10811725B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10811725-B2 |
| Application number | US-201715798557-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 31, 2017 |
| Priority date | Dec 9, 2016 |
| Publication date | Oct 20, 2020 |
| Grant date | Oct 20, 2020 |
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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 sulfide solid electrolyte material from an electrolyte raw material; and after said synthesizing, heating the synthesized material in a flow of a H 2 S gas or a H 2 gas at a temperature that is lower than the formation temperature of a low Li-ion conductive phase but no less than a melting point of β-sulfur; wherein the temperature, which is lower than the formation temperature of a low Li-ion conductive phase but no less than a melting point of β-sulfur, of the heating is within the range of 119.6° C. to 230° C. 2. The method of producing a sulfide solid electrolyte according to claim 1 , wherein said heating is in a flow of the 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 H 2 S gas or the H 2 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 H 2 S gas or the H 2 gas, pulverizing the synthesized material. 7. The method of producing a sulfide solid electrolyte according to claim 1 , wherein in said heating in the flow of the H 2 S gas or the H 2 gas, the synthesized material is heated at a temperature of no less than a crystallization temperature of the synthesized material, to obtain a sulfide solid electrolyte of glass ceramics.
Solid materials · CPC title
Li-accumulators · CPC title
Lithium compounds · CPC title
Sulfur, selenium, or tellurium compounds of phosphorus · CPC title
Manufacturing or production processes characterised by the final manufactured product · CPC title
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