Sulfide-based solid electrolyte for lithium ion batteries
US-9899701-B2 · Feb 20, 2018 · US
Sulfide-based solid electrolyte for lithium secondary battery
US11699809B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11699809-B2 |
| Application number | US-201716309136-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 16, 2017 |
| Priority date | Jul 1, 2016 |
| Publication date | Jul 11, 2023 |
| Grant date | Jul 11, 2023 |
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Abstract
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Provided is a sulfide-based solid electrolyte which is capable of suppressing the generation of hydrogen sulfide caused by reaction with moisture even when in contact with dry air in a dry room or the like, and capable of maintaining lithium ion conductivity. Proposed is a sulfide-based solid electrolyte for a lithium secondary battery, wherein the surface of a compound containing lithium, phosphorus, sulfur, and halogen, and having a cubic argyrodite-type crystal structure is coated with a compound containing lithium, phosphorus, and sulfur, and having a non-argyrodite-type crystal structure.
First claim
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The invention claimed is: 1. A sulfide-based solid electrolyte for a lithium secondary battery, wherein the surface of a core compound containing lithium, phosphorus, sulfur, and halogen, and having a cubic argyrodite-type crystal structure is coated with a coating compound containing lithium, phosphorus, and sulfur, and having a non-argyrodite-type crystal structure, and wherein the core compound having a cubic argyrodite-type crystal structure is represented by a compositional formula: Li 7-x-2y PS 6-x-y Ha x , where Ha represents a halogen and is at least one kind of element of fluorine (F), chlorine (Cl), bromine (Br), and iodine (I), and 0.4≤x≤1.7 and −0.9≤y≤−x+2 in the compositional formula. 2. The sulfide-based solid electrolyte for a lithium secondary battery according to claim 1 , wherein the coating compound having a non-argyrodite-type crystal structure constitutes a PS 4-R O R (0≤R<4) unit structure in the structure. 3. The sulfide-based solid electrolyte for a lithium secondary battery according to claim 1 , wherein the coating compound having a non-argyrodite-type crystal structure comprises a compound represented by a compositional formula: Li 3 PS 4-R O R (0≤R<4) as a main phase. 4. The sulfide-based solid electrolyte for a lithium secondary battery according to claim 1 , wherein the halogen is one of chlorine (Cl) or bromine (Br). 5. A lithium secondary battery comprising the sulfide-based solid electrolyte for a lithium secondary battery according to claim 1 . 6. A method of producing a sulfide-based solid electrolyte for a lithium secondary battery according to claim 1 , wherein a core compound containing lithium, phosphorus, sulfur, and halogen, and having a cubic argyrodite-type crystal structure, and a phosphorus sulfide or a phosphorus oxide, or both of these having a ratio of 0.1 to 42 mol in total relative to 100 mol of the core compound are mixed, and heated at a temperature of 100 to 300° C. in an inert atmosphere. 7. The sulfide-based solid electrolyte for a lithium secondary battery according to claim 2 , wherein the coating compound having a non-argyrodite-type crystal structure comprises a compound represented by a compositional formula: Li 3 PS 4-R O R (0≤R<4) as a main phase. 8. A lithium secondary battery comprising the sulfide-based solid electrolyte for a lithium secondary battery according to claim 2 . 9. A lithium secondary battery comprising the sulfide-based solid electrolyte for a lithium secondary battery according to claim 3 . 10. A lithium secondary battery comprising the sulfide-based solid electrolyte for a lithium secondary battery according to claim 4 .
Assignees
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Classifications
- H01M10/0562Primary
Solid materials · CPC title
sulfides · CPC title
Energy storage systems for electromobility, e.g. batteries · CPC title
mainly consisting of other non-metallic substances · CPC title
- H01M10/052Primary
Li-accumulators · CPC title
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- What does patent US11699809B2 cover?
- Provided is a sulfide-based solid electrolyte which is capable of suppressing the generation of hydrogen sulfide caused by reaction with moisture even when in contact with dry air in a dry room or the like, and capable of maintaining lithium ion conductivity. Proposed is a sulfide-based solid electrolyte for a lithium secondary battery, wherein the surface of a compound containing lithium, phos…
- Who is the assignee on this patent?
- Mitsui Mining & Smelting Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M10/0562. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jul 11 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).