Alkaline dry battery

Patent metadata

Field	Value
Publication number	US-10847786-B2
Application number	US-201716314767-A
Country	US
Kind code	B2
Filing date	Jul 18, 2017
Priority date	Oct 3, 2016
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

An alkaline dry battery includes a positive electrode, a gel negative electrode, a separator disposed between the positive electrode and the negative electrode, and an alkaline electrolyte solution contained in the positive electrode, the negative electrode, and the separator. The negative electrode contains a negative electrode active material containing zinc and particulate terephthalic acid. The terephthalic acid contained in the negative electrode has an average particle diameter of 25 to 210 μm.

First claim

The invention claimed is:

1. An alkaline dry battery comprising:
a positive electrode;
a gel negative electrode;
a separator disposed between the positive electrode and the negative electrode; and
an alkaline electrolyte solution contained in the positive electrode, the negative electrode, and the separator,
wherein the negative electrode contains a negative electrode active material containing zinc and particulate terephthalic acid, and
the terephthalic acid has an average particle diameter of 25 to 210 μm.

2. The alkaline dry battery according to claim 1 , wherein an amount of the terephthalic acid in the negative electrode is 0.01 to 0.5 parts by mass relative to 100 parts by mass of the negative electrode active material.

3. The alkaline dry battery according to claim 1 , wherein the terephthalic acid has an average particle diameter of 100 to 210 μm.

4. The alkaline dry battery according to claim 1 , wherein the separator contains 50 to 70 mass % of polyvinyl alcohol.

5. The alkaline dry battery according to claim 1 , wherein the negative electrode contains 0.1 to 1.0 parts by mass of a potassium halide relative to 100 parts by mass of the negative electrode active material.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Takahashi Yasufumi
• Fujiyoshi Satoshi

Classifications

• H01M50/489

  Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties · CPC title

• H01M4/62 Primary

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• H01M4/244

  Zinc electrodes · CPC title

• H01M6/06

  Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title