Carbonaceous material for lithium-air battery cathodes and lithium battery

Patent metadata

Field	Value
Publication number	US-9368849-B2
Application number	US-201314437562-A
Country	US
Kind code	B2
Filing date	Sep 30, 2013
Priority date	Oct 23, 2012
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

The present invention is to provide a carbonaceous material for lithium-air battery cathodes, which shows higher capacity than conventional carbonaceous materials. Disclosed are a carbonaceous material for lithium-air battery cathodes, wherein the carbonaceous material is a carbonaceous material for constituting the cathode of a lithium-air battery; wherein the carbonaceous material comprises nitrogen and a molar ratio of the nitrogen to the carbon is 1.9×10 −2 or more; and wherein the carbonaceous material is a glassy material, and a lithium-air battery comprising a cathode, wherein the cathode comprises the carbonaceous material.

First claim

The invention claimed is:

1. A carbonaceous material for lithium-air battery cathodes,
wherein the carbonaceous material is a carbonaceous material for constituting the cathode of a lithium-air battery;
wherein the carbonaceous material comprises nitrogen and a molar ratio of the nitrogen to the carbon is 1.9×10 −2 to 2.25×10 −2 ; and
wherein the carbonaceous material is a glassy material.

2. The carbonaceous material for lithium-air battery cathodes according to claim 1 , wherein the molar ratio of the nitrogen to the carbon is 1.90×10 −2 to 2.10×10 −2 .

3. The carbonaceous material for lithium-air battery cathodes according to claim 1 , wherein the molar ratio of the nitrogen to the carbon is 1.95×10 −2 to 2.25×10 −2 .

4. The carbonaceous material for lithium-air battery cathodes according to claim 1 , wherein the carbonaceous material comprises pyrrole and a molar ratio of the pyrrole to the carbon is 1.44×10 −2 to 1.52×10 −2 .

5. The carbonaceous material for lithium-air battery cathodes according to claim 1 , wherein the carbonaceous material comprises pyridine and a molar ratio of the pyridine to the carbon is 0.47×10 −2 to 0.50×10 −2 .

6. A lithium-air battery comprising a cathode, an anode and an electrolyte disposed between the cathode and the anode, wherein the cathode comprises the carbonaceous material defined by claim 1 .

Assignees

• Nisshinbo Holdings Inc

Inventors

• Iisaka Hirofumi
• Kishimoto Takeaki

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2004/8689

  Positive electrodes · CPC title

• H01M4/382

  Lithium (H01M4/405 takes precedence) · CPC title

• Y02E60/50

  Fuel cells · 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