Electrode, metal-air battery, and electrode manufacturing method

Patent metadata

Field	Value
Publication number	US-2015372297-A1
Application number	US-201414761459-A
Country	US
Kind code	A1
Filing date	Jan 9, 2014
Priority date	Jan 18, 2013
Publication date	Dec 24, 2015
Grant date	—

Abstract

A metal-air battery ( 1 ) includes a negative electrode ( 3 ), a positive electrode ( 2 ), and an electrolyte layer ( 4 ) disposed between the negative electrode ( 3 ) and the positive electrode ( 2 ). The negative electrode ( 3 ) includes a base member ( 31 ) which has a coiled shape and is formed of a conductive material and a deposited metal layer ( 32 ) in powder or particle state, which is formed on a surface of the base member ( 31 ) by electrolytic deposition. The electrolyte layer ( 4 ) contains an alkaline aqueous solution which contains the same metal as the deposited metal layer ( 32 ), and the positive electrode ( 2 ) has a tubular shape which is concentric with the negative electrode ( 3 ) having the coiled shape and surrounds the negative electrode ( 3 ). In this metal-air battery ( 1 ), it is possible to suppress occurrence of dendrites in the negative electrode ( 3 ).

First claim

1 . An electrode used as a negative electrode in a secondary battery, comprising:
a base member having a coiled shape, formed of a conductive material; and a deposited metal layer in powder or particle state, which is formed on a surface of said base member by electrolytic deposition.

2 . The electrode according to claim 1 , wherein
said deposited metal layer is formed of zinc.

3 . The electrode according to claim 2 , wherein
a density of said deposited metal layer is not lower than 2.10 g/cm 3 and not higher than 6.40 g/cm 3 .

4 . The electrode according to claim 1 , wherein
said base member contains copper or copper alloy.

5 . A metal-air battery comprising:
a negative electrode which is an electrode according to claim 1 ; a positive electrode; and an electrolyte layer disposed between said negative electrode and said positive electrode.

6 . The metal-air battery according to claim 5 , wherein
said electrolyte layer contains an alkaline aqueous solution which contains the same metal as said deposited metal layer, and said positive electrode has a tubular shape which is concentric with said negative electrode having a coiled shape and surrounds said negative electrode.

7 . An electrode manufacturing method of manufacturing an electrode used as a negative electrode in a secondary battery, comprising:
preparing a base member having a coiled shape, formed of a conductive material; and forming a deposited metal layer in powder or particle state on a surface of said base member by performing electrolytic deposition on said base member with an opposite electrode which surrounds said base member and has a tubular shape concentric with said base member in an alkaline aqueous solution containing a metal.

8 . The electrode manufacturing method according to claim 7 , wherein
said metal contained in said alkaline aqueous solution is zinc.

9 . The electrode manufacturing method according to claim 8 , wherein
a concentration of zinc in said alkaline aqueous solution is not lower than 8 g/L and not higher than 90 g/L.

10 . The electrode manufacturing method according to claim 7 , wherein
said base member contains copper or copper alloy.

11 . The electrode manufacturing method according to claim 7 , wherein
said alkaline aqueous solution contains a potassium hydroxide solution or a sodium hydroxide solution.

Assignees

• Hitachi Shipbuilding Eng Co

Inventors

• Kameyama Kazuya
• Aizawa Masanobu

Classifications

• H01M50/673

  Containers for storing liquids; Delivery conduits therefor · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/78

  Shapes other than plane or cylindrical, e.g. helical · CPC title

• H01M4/0452

  from solutions · 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