Alkaline storage battery

Patent metadata

Field	Value
Publication number	US-9972875-B2
Application number	US-201514955703-A
Country	US
Kind code	B2
Filing date	Dec 1, 2015
Priority date	Dec 4, 2014
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

An alkaline storage battery includes a positive electrode, a negative electrode containing, as an active material, at least one of a metal capable of forming dendrites and a metal compound thereof, and an alkaline electrolyte solution, wherein a compound having a primary amino group and having no carboxyl group is contained in the alkaline electrolyte solution in an amount greater than or equal to 7% by volume.

First claim

What is claimed is:

1. An alkaline storage battery comprising:
a positive electrode;
a negative electrode containing, as an active material, at least one of a metal capable of forming dendrites and a metal compound thereof; and
an alkaline electrolyte solution being an aqueous alkali solution,
wherein a compound having a primary amino group and having no carboxyl group is contained in the alkaline electrolyte solution in an amount greater than or equal to 7% by volume relative to a whole volume of the alkaline electrolyte solution, and
the compound included in the alkaline electrolyte solution includes at least one selected from the group consisting of ethylenediamine, propanediamine and butanediamine.

2. The alkaline storage battery according to claim 1 , wherein the compound is contained in an amount of 13 to 30% by volume relative to the whole volume of the alkaline electrolyte solution.

3. The alkaline storage battery according to claim 1 , wherein the alkaline storage battery is an open type battery.

4. The alkaline storage battery according to claim 1 , wherein the compound has a molecular weight less than or equal to 200.

5. The alkaline storage battery according to claim 4 , wherein the compound has a molecular weight less than or equal to 90.

6. The alkaline storage battery according to claim 1 , wherein the compound is contained at a concentration greater than or equal to 2% by mole in the alkaline electrolyte solution.

7. The alkaline storage battery according to claim 1 , wherein the alkaline electrolyte solution contains sodium hydroxide.

8. The alkaline storage battery according to claim 1 , wherein the metal capable of forming dendrites which is the active material of the negative electrode is at least one selected from the group consisting of Zn, Mg, Cd, Al, Ca and Fe.

9. The alkaline storage battery according to claim 8 , wherein the metal capable of forming dendrites is Zn.

10. The alkaline storage battery according to claim 1 , wherein the positive electrode is an air electrode.

Assignees

• Gs Yuasa Int Ltd
• Univ Kyoto
• Kyoro Univ

Inventors

• Kakeya Tadashi
• Nakata Akiyoshi
• Hirai Toshiro
• Arai Hajime
• Yamaki Junichi
• Ogumi Zempachi

Classifications

• H01M4/38

  of elements or alloys · 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

• H01M4/244

  Zinc electrodes · CPC title

• Y02E60/128

  Cross-Sectional Technologies · mapped topic

• H01M2300/0014

  Alkaline electrolytes · CPC title