Lithium-air secondary battery and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-10608259-B2
Application number	US-201715477793-A
Country	US
Kind code	B2
Filing date	Apr 3, 2017
Priority date	Oct 2, 2014
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

A method of manufacturing a lithium-air secondary battery is provided. The method includes preparing molybdenum oxide and a carbon structure, pulverizing and mixing the molybdenum oxide and the carbon structure by performing a ball-milling process on the molybdenum oxide and the carbon structure, and manufacturing molybdenum carbide by carburizing the molybdenum oxide with the carbon structure.

First claim

What is claimed is:

1. A method of manufacturing a lithium-air secondary battery, the method comprising:
preparing molybdenum oxide and a carbon structure;
pulverizing and mixing the molybdenum oxide, the carbon structure, and beads by performing a ball-milling process without a solution on the molybdenum oxide and the carbon structure;
separating the beads from the pulverized and mixed molybdenum oxide and carbon structure; and
directly after the beads are separated, thermally treating the pulverized and mixed molybdenum oxide and carbon structure to manufacture molybdenum carbide and a composite in which the molybdenum carbide is combined with the carbon structure.

2. The method of claim 1 , wherein the thermal treating of the carbon structure and the molybdenum oxide is performed in an inert gas atmosphere.

3. The method of claim 1 , further comprising:
manufacturing slurry using the composite; and
applying the slurry to a gas diffusion layer.

4. The method of claim 1 , wherein the ball-milling process is performed on the molybdenum oxide and the carbon structure in an inert gas atmosphere.

5. A method of manufacturing a positive electrode of a lithium-air secondary battery, the method comprising:
preparing molybdenum oxide and carbon nanotube;
ball-milling the molybdenum oxide, the carbon nanotube, and beads without a solution to pulverize and mix the molybdenum oxide and the carbon nanotube;
separating the beads from the pulverized and mixed molybdenum oxide and carbon nanotube;
directly after the beads are separated, thermally treating the pulverized and mixed molybdenum oxide and carbon nanotube to manufacture molybdenum carbide and a composite in which the molybdenum carbide is combined with the carbon nanotube;
mixing the composite with a binder to manufacture slurry; and
applying the slurry to a gas diffusion layer.

6. The method of claim 5 , wherein the molybdenum oxide is chemically carburized by the carbon nanotube to manufacture the molybdenum carbide.

7. The method of claim 5 , wherein generation and decomposition of Li 2 O 2 occurring in charging/discharging processes are accelerated by the composite.

8. The method of claim 5 , wherein a surface area of the composite is equal to or greater than 500 m 2 /g, and
wherein a pore volume of the composite is equal to or greater than 4 cc/g.

9. The method of claim 5 , wherein a diameter of the molybdenum carbide ranges from 20 nm to 100 nm.

Assignees

• Iucf Hyu

Inventors

• Sun Yangkook
• Kwak Wonjin

Classifications

• H01M4/8828

  Coating with slurry or ink · CPC title

• H01M4/8652

  as mixture · CPC title

• H01M4/8807

  Gas diffusion layers · CPC title

• H01M4/90

  Selection of catalytic material · CPC title

• H01M4/88 Primary

  Processes of manufacture · CPC title