Metal-air battery system including CO2 selective absorber and operating method therefor

Patent metadata

Field	Value
Publication number	US-9362581-B2
Application number	US-201213657169-A
Country	US
Kind code	B2
Filing date	Oct 22, 2012
Priority date	Oct 28, 2011
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

A metal-air battery system includes: a metal-air battery including a case and a charge/discharge member arranged in the case and having a cathode, an anode and an electrolyte; a CO 2 absorbing member having a CO 2 selective absorber selectively absorbing CO 2 over O 2 ; an outside air supplying member supplying outside air to the CO 2 absorbing member; a purified air supplying member supplying purified air to the cathode, the purified air having undergone absorptive CO 2 removal by the CO 2 selective absorber; and a recycling mechanism recycling the CO 2 selective absorber.

First claim

What is claimed is:

1. A metal-air battery system comprising:
a metal-air battery including a case and a charge and discharge member arranged in said case and comprising a cathode, an anode and an electrolyte, said case having an air hole;
a CO2 absorbing member having a CO2 selective absorber selectively absorbing CO2 over 02; an outside air supplying member supplying outside air to said CO2 absorbing member;
a purified air supplying member supplying purified air to said cathode through said air hole of said case, the purified air having undergone absorptive CO2 removal by said CO2 selective absorber; and
a recycling mechanism recycling said CO2 selective absorber.

2. The metal-air battery system of claim 1 , wherein said outside air supplying member has an outside air shutoff mechanism cutting off contact said CO 2 selective absorber with said outside air upon neither discharging nor recycling of said CO 2 selective absorber.

3. The metal-air battery system of claim 2 , wherein said purified air supplying member has a purified air shutoff mechanism cutting off contact said cathode with said purified air upon recycling of said CO 2 selective absorber.

4. The metal-air battery system of claim 2 , wherein said CO 2 selective absorber contains at least one of a mesoporous material and a zeolite.

5. The metal-air battery system of claim 1 , wherein said purified air supplying member has a purified air shutoff mechanism cutting off contact said cathode with said purified air upon recycling of said CO 2 selective absorber.

6. The metal-air battery system of claim 5 , wherein said CO 2 selective absorber contains at least one of a mesoporous material and a zeolite.

7. The metal-air battery system of claim 1 , wherein said CO 2 selective absorber contains at least one of a mesoporous material and a zeolite.

8. A method for operating a metal-air battery system according to claim 1 , comprising:
a discharging step of discharging electricity by supplying air to said cathode, the air having undergone absorptive CO 2 removal by said CO 2 selective absorber; and
a recycling step of recycling said CO 2 selective absorber.

9. The method for operating a metal-air battery system of claim 8 , further comprising a charging step of charging,
wherein said recycling step is carried out during said charging step.

10. The method for operating a metal-air battery system of claim 9 , comprising a pause step of cutting off contact said CO 2 selective absorber with outside air upon neither discharging electricity nor recycling of said CO 2 selective absorber.

11. The method for operating a metal-air battery system of claim 9 , wherein said cathode does not contact with said purified air upon recycling of said CO 2 selective absorber in said recycling step.

12. The method for operating a metal-air battery system of claim 8 , comprising a pause step of cutting off contact said CO 2 selective absorber with outside air upon neither discharging electricity nor recycling of said CO 2 selective absorber.

13. The method for operating a metal-air battery system of claim 12 , wherein said cathode does not contact with said purified air upon recycling of said CO 2 selective absorber in said recycling step.

14. The method for operating a metal-air battery system of claim 8 , wherein said cathode does not contact with said purified air upon recycling of said CO 2 selective absorber in said recycling step.

Assignees

• Ngk Insulators Ltd

Inventors

• Noda Kenichi
• Tomita Toshihiro

Classifications

• H01M8/0668 Primary

  Removal of carbon monoxide or carbon dioxide · CPC title

• H01M12/08

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

• Y02E60/50

  Fuel cells · CPC title

• H01M8/0687

  Reactant purification by the use of membranes or filters · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title