Lithium air secondary battery

Patent metadata

Field	Value
Publication number	US-11456498-B2
Application number	US-201917049538-A
Country	US
Kind code	B2
Filing date	May 14, 2019
Priority date	May 15, 2018
Publication date	Sep 27, 2022
Grant date	Sep 27, 2022

Abstract

Provided is a rechargeable lithium-air battery that improves charge-discharge energy efficiency and has good charge-discharge cycle performance. The rechargeable lithium-air battery includes: an air electrode including carbon; a negative electrode including metallic lithium or a lithium-containing substance; and an electrolyte in contact with the air electrode and the negative electrode. The electrolyte includes a salen-based metal complex and a quinone. The quinone includes any one or more of anthraquinone, 2,5-dihydroxy-1,4-benzoquinone, 7,7,8,8-tetracyanodimethane, 2,3-dichloro-5,6-dicyano-1,4-benzoquinone, tetrahydroxy-1,4-benzoquinone, and 2,5-di-tert-butyl-1,4-benzoquinone.

First claim

What is claimed is:

1. A rechargeable lithium-air battery comprising:
an air electrode comprising carbon;
a negative electrode comprising metallic lithium or a lithium-containing substance; and
an electrolyte in contact with the air electrode and the negative electrode, wherein the electrolyte comprises a salen-based metal complex and a quinone,
wherein the salen-based metal complex comprises at least one of (R,R)-(−)-N,N′-bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediaminochromium(III) chloride, (R,R)-(−)-N,N′-bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediaminomanganese(III) chloride, (R,R)-(−)-N,N′-bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediaminoiron(III) chloride, or (R,R)-(−)-N,N′-bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediaminocobalt(II).

2. The rechargeable lithium-air battery according to claim 1 , wherein the quinone comprises at least one of anthraquinone, 2,5-dihydroxy-1,4-benzoquinone, 7,7,8,8-tetracyanodimethane, 2,3-dichloro-5,6-dicyano-1,4-benzoquinone, tetrahydroxy-1,4-benzoquinone, or 2,5-di-tert-butyl-1,4-benzoquinone.

3. The rechargeable lithium-air battery according to claim 1 , wherein the salen-based metal complex is dissolved with a saturated concentration in the electrolyte.

4. The rechargeable lithium-air battery according to claim 1 , wherein the quinone is dissolved with a saturated concentration in the electrolyte.

5. The rechargeable lithium-air battery according to claim 2 , wherein the salen-based metal complex is dissolved with a saturated concentration in the electrolyte.

6. The rechargeable lithium-air battery according to claim 2 , wherein the quinone is dissolved with a saturated concentration in the electrolyte.

7. The rechargeable lithium-air battery according to claim 3 , wherein the quinone is dissolved with a saturated concentration in the electrolyte.

Assignees

• Nippon Telegraph & Telephone

Inventors

• Sakamoto Shuhei
• Hayashi Masahiko
• Nohara Masaya
• Iwata Mikayo
• Komatsu Takeshi

Classifications

• H01M4/382 Primary

  Lithium (H01M4/405 takes precedence) · CPC title

• H01M2300/0031

  Chlorinated solvents · CPC title

• H01M10/0565

  Polymeric materials, e.g. gel-type or solid-type · CPC title

• H01M12/08 Primary

  composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title