Air battery and method for using the same

Patent metadata

Field	Value
Publication number	US-11901593-B2
Application number	US-202117378769-A
Country	US
Kind code	B2
Filing date	Jul 19, 2021
Priority date	May 30, 2019
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

A charge/discharge method of an air battery is a charge/discharge method of an air battery including a positive electrode, a negative electrode, and a nonaqueous electrolyte liquid containing a nonaqueous solvent and a lithium salt dissolved in the nonaqueous solvent, the nonaqueous electrolyte liquid being interposed between the positive electrode and the negative electrode, the charge/discharge method includes: discharging the air battery; and supplying a charging liquid different from the nonaqueous electrolyte liquid from the outside to the inside of the air battery so that a discharge product generated by the discharging is desorbed from the positive electrode while being in the form of a solid.

First claim

What is claimed is:

1. A charge/discharge method of an air battery including a positive electrode, a negative electrode, and a nonaqueous electrolyte liquid containing a nonaqueous solvent and a lithium salt dissolved in the nonaqueous solvent, the nonaqueous electrolyte liquid being interposed between the positive electrode and the negative electrode, the method comprising:
discharging the air battery while generating a discharge product on the positive electrode;
supplying a charging liquid different from the nonaqueous electrolyte liquid from the outside to the inside of the air battery; and
leaving the air battery for a predetermined time to desorb the discharge product in a solid state from the positive electrode without an electrochemical reaction.

2. The charge/discharge method according to claim 1 , further comprising:
emitting the nonaqueous electrolyte liquid from the inside to the outside of the air battery after the discharging and before the supplying.

3. The charge/discharge method according to claim 2 , further comprising:
emitting the discharge product desorbed from the positive electrode together with the charging liquid to the outside of the air battery after the leaving; and
returning the nonaqueous electrolyte liquid from the outside to the inside of the air battery after the emitting of the discharge product.

4. The charge/discharge method according to claim 1 , further comprising:
emitting the nonaqueous electrolyte liquid from the inside to the outside of the air battery after the discharging and in parallel with the supplying.

5. The charge/discharge method according to claim 4 , further comprising:
emitting the discharge product desorbed from the positive electrode together with the charging liquid to the outside of the air battery after the leaving; and
returning the nonaqueous electrolyte liquid from the outside to the inside of the air battery after the emitting of the discharge product.

6. The charge/discharge method according to claim 1 , further comprising:
emitting the discharge product desorbed from the positive electrode together with the charging liquid to the outside of the air battery after the leaving.

7. The charge/discharge method according to claim 6 , further comprising:
supplying an electrolyte liquid to the inside of the air battery after the emitting.

8. The charge/discharge method according to claim 6 , wherein
no electric current flows through the positive electrode after the supplying of the charging liquid and before the emitting of the charging liquid.

9. The charge/discharge method according to claim 1 ,
wherein the charging liquid contains at least one selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), and a compound represented by the following formula (3):

10. The charge/discharge method according to claim 9 ,
wherein as the at least one selected from the group consisting of the compound represented by the formula (1), the compound represented by the formula (2), and the compound represented by the formula (3), the charging liquid contains at least one selected from the group consisting of tris(2,2,2-trifluoroethyl)phosphite, tris(2,2,2-trifluoroethyl)phosphate, tris(1,1,1,3,3,3-hexafluoro-2-propyl)phosphite, tris(2,2,2-trifluoroethyl)borate, and tris(hexafluoroisopropyl)borate.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Yokoyama Masako
• Fujimoto Masahisa
• Hibino Mitsuhiro

Classifications

• H01M8/043 Primary

  applied during specific periods · CPC title

• H01M10/44

  Methods for charging or discharging (circuits for charging H02J7/00) · 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

• H01M50/609

  Arrangements or processes for filling with liquid, e.g. electrolytes · CPC title

• H01M50/691

  Arrangements or processes for draining liquids from casings; Cleaning battery or cell casings · CPC title