# US 2021/0242501 A1 · Lithium Secondary Battery

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- Number: US 2021/0242501 A1
- Document ID: US20210242501A1
- Status: Published application
- Kind: A1
- Application number: 17/049,919
- Filed: 2019-05-14
- Published: 2021-08-05
- Earliest claimed: 2018-05-15
- Assignees: Nippon Telegraph and Telephone Corporation
- Applicants: Nippon Telegraph and Telephone Corporation
- Inventors: Shuhei Sakamoto; Yoko Ono; Masahiko Hayashi; Takeshi Komatsu
- Web page: https://patentgrep.com/patent/US20210242501A1

## CPC

- H01M 10/0569: characterised by the solvents
- 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
- H01M 10/0562: Solid materials
- H01M 10/0565: Polymeric materials, e.g. gel-type or solid-type
- H01M 10/0567: characterised by the additives
- H01M 10/0568: characterised by the solutes
- H01M 2004/027: {Negative electrodes}
- H01M 2004/028: {Positive electrodes}
- H01M 2300/0034: Fluorinated solvents
- H01M 2300/0082: Organic polymers
- H01M 2300/0085: Immobilising or gelification of electrolyte
- 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 lithium secondary battery improved in characteristics by reducing resistance of an electrode-electrolyte interface. The lithium secondary battery includes: a positive electrode made of a solid capable of intercalation and deintercalation of a lithium ion; a lithium ion-conductive electrolyte including a quinone which is an organic compound; and a negative electrode made of a solid capable of occlusion and release of a lithium metal or a lithium ion. The organic compound includes any one or more of anthraquinone (AQ), 2,5-dihydroxy-1,4-benzoquinone (DHBQ), 7,7,8,8-tetracyanodimethane (TCNQ), 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ), tetrahydroxy-1,4-benzoquinone (THBQ), and 2,5-di-tert-butyl-1,4-benzoquinone (DBBQ).

## Claims

### Claim 1

A lithium secondary battery comprising:
a positive electrode made of a solid capable of intercalation and deintercalation of a lithium ion;
a lithium ion-conductive electrolyte comprising a quinone which is an organic compound; and
a negative electrode made of a solid capable of occlusion and release of a lithium metal or a lithium ion.

### Claim 2 (depends on 1)

The lithium secondary battery according to claim 1, wherein
the organic compound comprises at least one of anthraquinone (AQ), 2,5-dihydroxy-1,4-benzoquinone (DHBQ), 7,7,8,8-tetracyanodimethane (TCNQ), 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ), tetrahydroxy-1,4-benzoquinone (THBQ), or 2,5-di-tert-butyl-1,4-benzoquinone (DBBQ).

### Claim 3 (depends on 1)

The lithium secondary battery according to claim 1, wherein the electrolyte comprises a lithium ion-conductive organic electrolyte solution.

### Claim 4 (depends on 1)

The lithium secondary battery according to claim 1, wherein the electrolyte comprises a lithium ion-conductive gel polymer electrolyte.

### Claim 5 (depends on 1)

The lithium secondary battery according to claim 1, wherein the electrolyte comprises a lithium ion-conductive solid electrolyte.

### Claim 6 (depends on 2)

The lithium secondary battery according to claim 2, wherein the electrolyte comprises a lithium ion-conductive organic electrolyte solution.

### Claim 7 (depends on 2)

The lithium secondary battery according to claim 2, wherein the electrolyte comprises a lithium ion-conductive gel polymer electrolyte.

### Claim 8 (depends on 2)

The lithium secondary battery according to claim 2, wherein the electrolyte comprises a lithium ion-conductive solid electrolyte.