Alkaline storage battery

Patent metadata

Field	Value
Publication number	US-10693127-B2
Application number	US-201615214069-A
Country	US
Kind code	B2
Filing date	Jul 19, 2016
Priority date	Jul 30, 2015
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

An alkaline storage battery contains: a positive electrode; a negative electrode containing, as an active material, at least one of a metal capable of forming a dendrite and a metal compound thereof; and an alkaline electrolyte. The alkaline electrolyte contains a compound which is a chain saturated hydrocarbon at least partially having a hydrophilic functional group other than a hydroxyl group and having a molecular weight of 400 or more and less than 220000 in an amount of less than 15 g per 100 mL of the electrolyte.

First claim

What is claimed:

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 a dendrite and a metal compound thereof; and
an alkaline electrolyte,
wherein the alkaline electrolyte contains a compound which is a chain saturated hydrocarbon having a hydroxyl group and a functional group selected from the group consisting of a carboxyl group, a sulfone group and -CH(OH)-CH 2 (OH) and having a molecular weight of 400 or more and less than 220000 in an amount of 2.5 g or more and less than 15 g per 100 mL of the electrolyte, and
the compound has a plurality of monomer units, each of the plurality of monomer units being the following formula:

where R includes hydrogen, halogen or an alkyl group, and A or B in at least one of the plurality of monomer units is the hydroxyl group, and A or B in at least another one of the plurality of monomer units is the functional group selected from the group consisting of the carboxyl group, the sulfone group and -CH(OH)-CH 2 (OH) and wherein each remaining A and B in the formula is independently one selected from a group consisting of hydrogen, the hydroxyl group, a hydrophobic group and the functional group selected from the group consisting of the carboxyl group, the sulfone group and -CH(OH)-CH 2 (OH).

2. The alkaline storage battery according to claim 1 , wherein the compound is brought into contact with at least the positive electrode.

3. The alkaline storage battery according to claim 1 , wherein the metal capable of forming dendrite is at least one of Zn, Mg, Cd, Al, Ca, and Fe.

4. The alkaline storage battery according to claim 1 , wherein a molar ratio of the functional group selected from the group consisting of the carboxyl group, the sulfone group and -CH(OH)-CH 2 (OH) in the compound to a total of the hydroxyl group and the functional group selected from the group consisting of the carboxyl group, the sulfone group and -CH(OH)-CH 2 (OH) in the compound is 2.1% or more.

5. The alkaline storage battery according to claim 1 , wherein 25 mol% or more of groups bonded to a carbon of a carbon main chain of the compound are the hydroxyl group and the functional group selected from the group consisting of the carboxyl group, the sulfone group and -CH(OH)-CH 2 (OH).

6. The alkaline storage battery according to claim 4 , wherein 25 mol% or more of groups bonded to a carbon of a carbon main chain of the compound are the hydroxyl group and the functional group selected from the group consisting of the carboxyl group, the sulfone group and -CH(OH)-CH 2 (OH).

Assignees

• Gs Yuasa Int Ltd
• Univ Kyoto

Inventors

• Kakeya Tadashi
• Nakata Akiyoshi
• Arai Hajime
• Ogumi Zempachi

Classifications

• H01M10/26 Primary

  Selection of materials as electrolytes · CPC title

• Y02E60/50

  Fuel cells · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/30

  Nickel accumulators (H01M10/34 takes precedence) · CPC title

• H01M2004/027

  Negative electrodes · CPC title