Lithium-air battery air electrode and its preparation method

Patent metadata

Field	Value
Publication number	US-9705165-B2
Application number	US-201113979803-A
Country	US
Kind code	B2
Filing date	Aug 31, 2011
Priority date	Aug 31, 2010
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

The present invention provides a lithium-air battery air electrode, the air electrode comprises: a collector, an in-situ loading catalyst on collector. The invention also provides a preparation method of the air electrode for lithium-air batteries and the lithium-air batteries. The air electrode of the present invention can greatly improve the performance of the lithium-air battery.

First claim

The invention claimed is:

1. An air electrode for a lithium-air battery, comprising:
a collector; and
an in-situ catalyst that is directly deposited or grown in-situ on the wherein the collector has a porosity rate of ≧90% 100 to 300 psi (number of holes/inch), and a pore diameter of 10-500 μm, terminated by BD national standards.

2. The air electrode of claim 1 , wherein the air electrode is without binder.

3. The air electrode of claim 1 , wherein the collector is selected from a porous collector group which has the electron conductivity of 5 to 64 MS/m and the redox potential of −0.250 to −1V, determined by metal material conductivity tester and the standard electrode potential method.

4. The air electrode of claim 1 , wherein the in-situ catalyst has an oxygen evolution reaction potential in a range of 3.1-4.5 V and an oxygen reduction potential in a range of 2.5-3.1 V, determined by cyclic voltammetric method.

5. The air electrode of claim 1 , wherein the in-situ catalyst has a loading amount of 1-10 mg of the in-situ catalyst per 1 cm 2 of the collector.

6. The air electrode of claim 1 , wherein the in-situ catalyst has a volume equivalent diameter of 100 nm-1000 nm.

7. A method for preparation of an air electrode of a lithium-air battery of claim 1 , comprising:
(A) providing the collector; and
(B) forming an in-situ catalyst on the collector by direct deposit or growth of a catalyst in-situ on the collector.

8. The method of claim 7 , wherein the step (B) is performed in accordance with an in-situ method selected from the group consisting of a solvothermal method, a template method, electrophoretic deposition, electroplating deposition, and electrostatic spray deposition method.

9. A lithium-air battery containing an air electrode as claimed in claim 1 .

10. The air electrode of claim 1 , wherein the collector is a porous metal collector or a porous non-metallic collector.

11. The air electrode of claim 10 , wherein the porous metal collector is selected from the group consisting of metal Ni foam, Ti foam, Au foam, and Pt foam.

12. The air electrode of claim 10 , wherein the porous non-metallic collector is selected from the group consisting of C foam and porous Si.

13. An air electrode for a lithium-air battery, comprising:
a collector; and
an in-situ catalyst that is loaded in-situ on the collector,
wherein the collector has a porosity rate of ≧90%, 100 to 300 ppi (number of holes/inch), and a pore diameter of 10-500 μm, terminated by GB national standards.

Assignees

• Wen Zhaoyin
• Cui Yanming
• Liu Yu
• Wu Xiangwei
• Zhang Jingchao
• Shanghai Inst Ceramics Cas

Inventors

• Wen Zhaoyin
• Cui Yanming
• Liu Yu
• Wu Xiangwei
• Zhang Jingchao

Classifications

• H01M4/8605 Primary

  Porous electrodes · CPC title

• H01M4/8846

  Impregnation · CPC title

• Y02E60/128

  Cross-Sectional Technologies · mapped topic

• C25D13/12

  characterised by the article coated · CPC title

• H01M4/8853

  Electrodeposition · CPC title