# US 2021/0242491 A1 · Sulfide solid electrolyte and all solid state battery

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- Number: US 2021/0242491 A1
- Document ID: US20210242491A1
- Status: Published application
- Kind: A1
- Application number: 17/049,136
- Filed: 2019-03-01
- Published: 2021-08-05
- Earliest claimed: 2018-04-25
- Assignees: Tokyo Institute of Technology; Toyota Jidosha Kabushiki Kaisha
- Applicants: Tokyo Institute of Technology; Toyota Jidosha Kabushiki Kaisha
- Inventors: Ryoji KANNO; Satoshi HORI; Shinya SHIOTANI
- Web page: https://patentgrep.com/patent/US20210242491A1

## CPC

- H01M 10/0562: Solid materials
- C01B 17/22: Alkali metal sulfides or polysulfides
- C01D 15/00: Lithium compounds
- H01B 1/10: sulfides
- H01M 10/052: Li-accumulators
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram
- C01P 2002/86: by NMR- or ESR-data
- C01P 2004/04: obtained by TEM, STEM, STM or AFM
- H01M 2300/0068: inorganic
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C01D: COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts of peroxyacids C01B15/00; sulfides C01B17/22; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds other than ammonia and cyanogen, containing nitrogen and other non-metals C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; phosphides C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; cyanides C01C3/08; salts of cyanic acid C01C3/14; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A sulfide solid electrolyte is capable of suppressing a decrease in Li ion conductivity due to moisture. A sulfide solid electrolyte includes a Li element, a P element, a S element and an O element, and having a granular shape, and including a crystal portion oriented along the granular shape, on an inner surface of the sulfide solid electrolyte.

## Claims

### Claim at position 1

-5. (canceled)

### Claim 6

A sulfide solid electrolyte comprising a Li element, a P element, a S element and an O element, and
having a granular shape, and
including a crystal portion oriented along the granular shape, on an inner surface of the sulfide solid electrolyte.

### Claim 7 (depends on 6)

The sulfide solid electrolyte according to claim 6, wherein the sulfide solid electrolyte has a composition represented by Li3+xPS4−yOy, wherein x satisfies 0≤x≤1, and y satisfies 0<y<4.

### Claim 8 (depends on 7)

The sulfide solid electrolyte according to claim 7, wherein the x satisfies 0≤x≤0.2, and the y satisfies 0.8≤y≤1.2.

### Claim 9 (depends on 6)

The sulfide solid electrolyte according to claim 6, wherein a thickness of the crystal portion is 1.7 nm or more.

### Claim 10 (depends on 6)

An all solid state battery comprising a cathode active material layer including a cathode active material, an anode active material layer including an anode active material, and a solid electrolyte layer formed between the cathode active material layer and the anode active material layer, and
at least one of the cathode active material layer, the anode active material layer, and the solid electrolyte layer includes the sulfide solid electrolyte according to claim 6.