Metal Air Battery and Manufacturing Method of Air Electrode

Patent metadata

Field	Value
Publication number	US-2023411634-A1
Application number	US-202018249140-A
Country	US
Kind code	A1
Filing date	Nov 4, 2020
Priority date	Nov 4, 2020
Publication date	Dec 21, 2023
Grant date	—

Abstract

A metal-air battery includes: an air electrode; a negative electrode containing a metal; and an electrolyte having ion conductivity. The air electrode includes: a co-continuous body having a three-dimensional network structure in which a plurality of nanostructures is split and integrated; and mesoporous carbon supported on the co-continuous body.

First claim

1 . A metal-air battery comprising:
an air electrode; a negative electrode containing a metal; and an electrolyte having ion conductivity, wherein the air electrode includes: a co-continuous body having a three-dimensional network structure in which a plurality of nanostructures is split and integrated; and mesoporous carbon supported on the co-continuous body.

2 . The metal-air battery according to claim 1 , wherein
the air electrode includes a catalyst, and the catalyst contains at least one metal selected from the group consisting of iron, manganese, zinc, copper, and molybdenum, or an oxide of at least one metal selected from the group consisting of calcium, iron, manganese, zinc, copper, and molybdenum.

3 . A method for manufacturing an air electrode of a metal-air battery, the method comprising:
a synthesizing step of synthesizing mesoporous carbon; a producing step of producing a sol or gel in which the mesoporous carbon and a plurality of nanostructures are dispersed; a freezing step of freezing the sol or gel, to obtain a frozen material; and a drying step of drying the frozen material in vacuum, to obtain a co-continuous body having a three-dimensional network structure, the mesoporous carbon being supported on the co-continuous body, the plurality of nanostructures being split and integrated in the co-continuous body.

4 . A method for manufacturing an air electrode of a metal-air battery, the method comprising:
a precursor synthesizing step of causing mesoporous silica as a template to react with an organic compound, to obtain a precursor of mesoporous carbon; a producing step of producing a sol or gel in which the precursor and a plurality of nanostructures are dispersed; a freezing step of freezing the sol or gel, to obtain a frozen material; a drying step of drying the frozen material in vacuum, to obtain a co-continuous body having a three-dimensional network structure, the precursor being supported on the co-continuous body, the plurality of nanostructures being split and integrated in the co-continuous body; a carbonizing step of heating the co-continuous body in an inert gas atmosphere, to carbonize the precursor supported on the co-continuous body; and a synthesizing step of performing etching on the carbonized precursor, to remove the mesoporous silica of the precursor, and synthesizing the mesoporous carbon.

5 . The method for manufacturing an air electrode according to claim 3 , further comprising
a catalyst supporting step of supporting a catalyst on the co-continuous body.

6 . The method for manufacturing an air electrode according to claim 4 , further comprising
a catalyst supporting step of supporting a catalyst on the co-continuous body.

Assignees

• Nippon Telegraph & Telephone

Inventors

• Iwata Mikayo
• Nohara Masaya
• Taguchi Hiroaki
• Komatsu Takeshi

Classifications

• H01M4/9016 Primary

  Oxides, hydroxides or oxygenated metallic salts · CPC title

• H01M12/06 Primary

  with one metallic and one gaseous electrode · CPC title

• H01M4/8842

  Coating using a catalyst salt precursor in solution followed by evaporation and reduction of the precursor · CPC title

• H01M4/86

  Inert electrodes with catalytic activity, e.g. for fuel cells · CPC title

• H01M4/96

  Carbon-based electrodes · CPC title