# US 8,771,883 B2 · Alkaline battery

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- Number: US 8,771,883 B2
- Document ID: US8771883B2
- Status: Granted
- Kind: B2
- Application number: 13/073,373
- Filed: 2011-03-28
- Published: 2011-07-14
- Granted: 2014-07-08
- Earliest claimed: 2004-05-13
- Assignees: Panasonic Corporation
- Applicants: Harunari Shimamura; Koshi Takamura; Nobuharu Koshiba
- Inventors: Harunari Shimamura; Koshi Takamura; Nobuharu Koshiba
- Web page: https://patentgrep.com/patent/US8771883B2

## CPC

- H01M 6/06: Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
- H01M 4/244: {Zinc electrodes}
- H01M 6/04: Cells with aqueous electrolyte
- H01M 6/045: {characterised by aqueous electrolyte}
- H01M 2300/0085: Immobilising or gelification of electrolyte
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

An alkaline battery of this invention includes: a negative electrode including a negative electrode mixture that contains a zinc alloy as an active material, the zinc alloy containing at least aluminum; an alkaline electrolyte; and a positive electrode. The alkaline electrolyte includes an aqueous KOH solution and LiOH and an aluminum compound that are dissolved in the aqueous KOH solution. The alkaline battery has excellent high-rate discharge characteristics.

## Claims

### Claim 1

An alkaline battery comprising: a negative electrode including a negative electrode mixture that contains a zinc alloy as an active material, said zinc alloy containing at least aluminum;
an alkaline electrolyte; and
a positive electrode, wherein said alkaline electrolyte comprises an aqueous KOH solution and LiOH and aluminum hydroxide that are dissolved in said aqueous KOH solution, wherein a portion of the alkaline electrolyte is contained in the negative electrode mixture,
wherein the amounts of the LiOH and the aluminum hydroxide contained in the portion of the alkaline electrolyte in said negative electrode mixture are 0.1 to 2 wt % and 0.001 to 0.2 wt % of the negative electrode mixture, respectively; and
wherein the positive electrode is an air electrode.

### Claim 2 (depends on 1)

The alkaline battery in accordance with claim 1, wherein the weight ratio of the alkaline electrolyte to the zinc alloy of the negative electrode is 0.1 to 2.