# US 12,002,926 B2 · Electrolyte, electrochemical device, lithium ion secondary battery, and module

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,002,926 B2
- Document ID: US12002926B2
- Status: Granted
- Kind: B2
- Application number: 16/768,471
- Filed: 2018-10-02
- Published: 2021-01-07
- Granted: 2024-06-04
- Earliest claimed: 2017-12-01
- Assignees: Daikin Industries, Ltd.
- Applicants: Daikin Industries, Ltd.
- Inventors: Masakazu Kinoshita; Yuuki Suzuki; Shigeaki Yamazaki; Kenzou Takahashi; Tomoya Hidaka; Yoshiko Kuwajima; Akiyoshi Yamauchi; Kotaro Hayashi
- Web page: https://patentgrep.com/patent/US12002926B2

## CPC

- H01M 10/0568: characterised by the solutes
- H01G 11/64: characterised by additives
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/0567: characterised by the additives
- H01G 9/2004: {characterised by the electrolyte, e.g. comprising an organic electrolyte}
- H01G 11/06: with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
- H01G 11/34: characterised by carbonisation or activation of carbon
- H01G 11/62: characterised by the solute, e.g. salts, anions or cations therein
- H01M 2300/0025: Organic electrolyte
- H01M 2300/0037: Mixture of solvents
- Y02E 10/542: Dye sensitized solar cells
- Y02E 60/10: Energy storage using batteries
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

An electrolyte solution containing LiFSO3 and a compound (1) represented by the following formula (1): LiZ, wherein Z is PF6, BF4, N(FSO2)2, N(CF3SO2)2, N(C2F5SO2)2, PO2F2, or B(C2O4)2. The electrolyte solution has a ratio [FSO3]/[Z] of a molar content of FSO3 [FSO3] to a molar content of Z [Z] of 3 to 1000. Also disclosed is an electrochemical device including the electrolyte solution, a lithium ion secondary battery including the electrolyte solution and a module including the electrochemical device.

## Claims

### Claim 1

An electrolyte solution comprising LiFSO3 and a compound (1) represented by the following formula (1): LiZ,
wherein Z is PF6, BF4, N(FSO2)2, N(CF3SO2)2, N(C2F5SO2)2, PO2F2, or
the electrolyte solution having a ratio [FSO3]/[Z] of a molar content of FSO3 [FSO3] to a molar content of Z [Z] of 3 to 1000.

### Claim 2 (depends on 1)

The electrolyte solution according to claim 1,
wherein the electrolyte solution contains LiFSO3 at a concentration of 0.01 to 5.0 mol/L.

### Claim 3 (depends on 1)

An electrochemical device comprising the electrolyte solution according to claim 1.

### Claim 4 (depends on 3)

A module comprising the electrochemical device according to claim 3.

### Claim 5 (depends on 1)

A lithium ion secondary battery comprising the electrolyte solution according to claim 1.

### Claim 6 (depends on 5)

A module comprising the lithium ion secondary battery according to claim 5.