# US 12,009,480 B2 · Metal-sulfur battery

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- Number: US 12,009,480 B2
- Document ID: US12009480B2
- Status: Granted
- Kind: B2
- Application number: 17/281,280
- Filed: 2019-09-29
- Published: 2022-01-06
- Granted: 2024-06-11
- Earliest claimed: 2018-09-30
- Assignees: Shenzhen Capchem Technology Co., Ltd.
- Applicants: Shenzhen Capchem Technology Co., Ltd.
- Inventors: Yonghong Deng; Bing Han; Yinglin Xiao
- Web page: https://patentgrep.com/patent/US12009480B2

## CPC

- H01M 10/0568: characterised by the solutes
- H01M 4/364: {as mixtures}
- H01M 4/38: of elements or alloys
- H01M 4/381: {Alkaline or alkaline earth metals elements (H01M4/40 takes precedence)}
- H01M 4/382: {Lithium (H01M4/405 takes precedence)}
- H01M 4/5815: {Sulfides}
- H01M 4/625: {Carbon or graphite}
- H01M 10/052: Li-accumulators
- H01M 10/0567: characterised by the additives
- H01M 10/0569: characterised by the solvents
- H01M 2300/0034: Fluorinated solvents
- H01M 2300/0037: Mixture of solvents
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Provided is a metal-sulfur battery, comprising a positive electrode material, a negative electrode material and an electrolyte, the positive electrode material comprises one of elemental sulfur and S-based compound; the electrolyte comprises a solvent and an electrolyte salt; and the electrolyte salt comprises one or more salts represented by structural formulas 1-3: wherein, R1 is selected from S or Se; R2 is selected from C, Si, Ge or Sn; M1 is selected from N, B, P, As, Sb or Bi; M2 is selected from Li, Na, K, Ru, Cs, Fr, Al, Mg, Zn, Be, Ca, Sr, Ba or Ra; R3 is selected from a carbon chain or an aromatic ring with part or all of hydrogen substituted by other elements or groups. The metal-sulfur battery provided by the disclosure can effectively solve the short circuit problem caused by metal dendrites on the negative electrode of existing metal-sulfur battery.

## Claims

### Claim 1

A metal-sulfur battery, comprising a positive electrode material, a negative electrode material and an electrolyte, the positive electrode material comprises one of elemental sulfur or S-based compound; the electrolyte comprises a solvent and an electrolyte salt; and the electrolyte salt comprises one or more salts represented by structural formulas 1-3:
wherein, R1 is selected from S or Se; R2 is selected from C, Si, Ge or Sn; M1 is selected from N, B, P, As, Sb or Bi; M2 is selected from Li, Na, K, Ru, Cs, Fr, Al, Mg, Zn, Be, Ca, Sr, Ba or Ra; R3 is selected from an unsaturated carbon chain containing 1-4 carbons with part or all of hydrogen substituted by a halogen element or a halogenated hydrocarbyl group.

### Claim 2 (depends on 1)

The metal-sulfur battery of claim 1, wherein the content of the electrolyte salt is 0.01M˜10M.

### Claim 3 (depends on 1)

The metal-sulfur battery of claim 1, wherein the electrolyte salt comprises one or more of the following compounds:

### Claim 4 (depends on 1)

The metal-sulfur battery of claim 1, wherein the positive electrode material is a sulfur/carbon composite.

### Claim 5 (depends on 1)

The metal-sulfur battery of claim 1, wherein the positive electrode material is a ketjen black/sulfur composite.

### Claim 6 (depends on 1)

The metal-sulfur battery of claim 1, wherein the electrolyte further comprises a nitrate, and a mass percentage of the nitrate is 0.1%-5% based on the mass of the electrolyte being 100%.

### Claim 7 (depends on 1)

The metal-sulfur battery of claim 1, wherein the negative electrode material comprises one or more of elemental lithium, elemental sodium, elemental potassium, elemental aluminum or elemental magnesium.

### Claim 8 (depends on 1)

The metal-sulfur battery of claim 1, further comprising a separator interposed between the positive electrode material and the negative electrode material.

### Claim 9 (depends on 1)

The metal-sulfur battery of claim 1, wherein the metal-sulfur battery is a lithium-sulfur battery.

### Claim 10 (depends on 1)

The metal-sulfur battery of claim 1, wherein the solvent is selected from one or more of a fluorinated solvent, ethylene glycol dimethyl ether, 1,3-dioxolane, propylene sulfite or methyl propionate.

### Claim 11 (depends on 10)

The metal-sulfur battery of claim 10, wherein the fluorinated solvent comprises one or more of fluoroethylene carbonate, 3,3,3-fluoroethyl methyl carbonate or 1,1,2,2-tetrafluoroethyl-2′,2′,2′-trifluoroethyl ether.

### Claim 12 (depends on 1)

The metal-sulfur battery of claim 1, wherein the electrolyte salt further comprises one or more of LiPF6, LiBF4, LiBOB, LiClO4, LiCF3SO3, LiDFOB, LiN(SO2CF3)2 or LiN(SO2F)2.