# US 2021/0242496 A1 · Sulfide solid electrolyte and treatment method therefor

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- Number: US 2021/0242496 A1
- Document ID: US20210242496A1
- Status: Published application
- Kind: A1
- Application number: 17/254,477
- Filed: 2019-11-22
- Published: 2021-08-05
- Earliest claimed: 2018-11-22
- Assignees: Idemitsu Kosan Co., Ltd.
- Applicants: Idemitsu Kosan Co., Ltd.
- Inventors: Masayuki SHIBATA; Hiroaki YAMADA; Nobuhito NAKAYA; Yusuke ISEKI; Minoru SENGA; Takashi HAYAKAWA; Shogo SHIMADA; Tomoyuki OKUYAMA; Koji KATO
- Web page: https://patentgrep.com/patent/US20210242496A1

## CPC

- H01M 10/052: Li-accumulators
- H01M 10/0562: Solid materials
- C01D 15/00: Lithium compounds
- H01B 1/06: mainly consisting of other non-metallic substances
- H01B 1/10: sulfides
- H01B 13/00: Apparatus or processes specially adapted for manufacturing conductors or cables
- H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
- H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)}
- C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram
- C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer
- C01P 2004/62: Submicrometer sized, i.e. from 0.1-1 micrometer
- C01P 2004/64: Nanometer sized, i.e. from 1-100 nanometer
- C01P 2006/12: Surface area
- H01M 2300/0068: inorganic
- H01M 2300/008: Halides
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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, which is able to adjust the morphology unavailable traditionally, or is readily adjusted so as to have a desired morphology, the sulfide solid electrolyte having a volume-based average particle diameter measured by laser diffraction particle size distribution measurement of 3 μm or more and a specific surface area measured by the BET method of 20 m2/g or more; and a method of treating a sulfide solid electrolyte including the sulfide solid electrolyte being subjected to at least one mechanical treatment selected from disintegration and granulation.

## Claims

### Claim 1

A sulfide solid electrolyte having
a volume-based average particle diameter measured by laser diffraction particle size distribution measurement of 3 μm or more and
a specific surface area measured by a BET method of 20 m2/g or more.

### Claim 2 (depends on 1)

The sulfide solid electrolyte of claim 1, which is a precursor suitable for at least one mechanical treatment selected from the group consisting of disintegration and granulation.

### Claim 3 (depends on 1)

The sulfide solid electrolyte of claim 1, comprising a lithium element, a sulfur element, a phosphorus element, and a halogen element.

### Claim 4 (depends on 1)

The sulfide solid electrolyte of claim 1, which is amorphous or crystalline.

### Claim 5 (depends on 1)

The sulfide solid electrolyte of claim 1, which is crystalline.

### Claim 6 (depends on 4)

The sulfide solid electrolyte of claim 4, wherein a half width of a maximum peak including a background at 2θ=10 to 40° in X-ray diffractometry using a CuKα ray is Δ2θ=0.32 or less.

### Claim 7 (depends on 1)

The sulfide solid electrolyte of claim 1, having a thio-LISICON Region II-type crystal structure.

### Claim 8

A method of treating a sulfide solid electrolyte, the method comprising subjecting a sulfide solid electrolyte having a volume-based average particle diameter measured by laser diffraction particle size distribution measurement of 3 μm or more and a specific surface area measured by a BET method of 20 m2/g or more to at least one mechanical treatment selected from the group consisting of disintegration and granulation.

### Claim 9 (depends on 8)

The method of claim 8, wherein the at least one mechanical treatment is performed with a pulverizer or an agitator.

### Claim 10 (depends on 8)

The method of claim 8, wherein the at least one mechanical treatment is performed using a solvent.

### Claim 11 (depends on 8)

The method of claim 8, wherein the at least one mechanical treatment is performed with a ball mill, a bead mill, or a high-speed rotation thin-film-type agitator.

### Claim 12 (depends on 8)

The method of claim 8, wherein the at least one mechanical treatment is performed with a pulverizer provided with a rotating body capable of agitating the sulfide solid electrolyte, and a circumferential velocity of the rotating body is adjusted, thereby adjusting the disintegration or granulation of the sulfide solid electrolyte in the at least one mechanical treatment.

### Claim 13 (depends on 12)

The method of claim 12, wherein the rotating body is rotated at a low circumferential velocity, to achieve the disintegration, or the rotating body is rotated at a high circumferential velocity, to achieve the granulation.

### Claim 14 (depends on 8)

The method of claim 8, wherein the at least one mechanical treatment is performed with a high-speed rotation thin-film-type agitator.

### Claim 15 (depends on 8)

The method of claim 8, further comprising heating after the at least one mechanical treatment.

### Claim 16 (depends on 8)

The method of claim 8, wherein the sulfide solid electrolyte is obtained through a process comprising mixing a raw material inclusion comprising a lithium element, a sulfur element, a phosphorus element, and a halogen element with a complexing agent.

### Claim 17 (depends on 16)

The method of claim 16, wherein the process comprises pulverizing an electrolyte precursor obtained through the mixing.

### Claim 18 (depends on 16)

The method of claim 16, wherein the process comprises heating an electrolyte precursor obtained through the mixing, or an electrolyte precursor pulverized product obtained through pulverizing the electrolyte precursor.

### Claim 19 (depends on 1)

The sulfide solid electrolyte of claim 1, having a volume-based average particle diameter measured by laser diffraction particle size distribution measurement of 150 μm or less.