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Alkaline battery with improved discharge efficiency

An alkaline and battery technology, applied in dry batteries, battery electrodes, primary batteries, etc., can solve the problems of high battery outgassing and reduced battery capacity

Pending Publication Date: 2022-07-01
ENERGIZER BRANDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the net increase in zinc surface area with the addition of zinc fine particles results in high battery gassing and can cause reduced battery capacity and earlier leakage of alkaline cells during high temperature storage conditions

Method used

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  • Alkaline battery with improved discharge efficiency
  • Alkaline battery with improved discharge efficiency
  • Alkaline battery with improved discharge efficiency

Examples

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Effect test

example

[0075] In the examples presented below, electrochemical cells were tested for DSC performance, partially discharged cell gassing, undischarged cell gassing, and conditions after storage. A gelled anode was prepared according to the improvements of the present disclosure.

[0076] Gel viscosity was measured using a Brookfield digital viscometer and a Teflon-coated spindle #06 at 4 rpm. When measuring, allow the reading to stabilize for more than 5 minutes before recording the viscosity value.

[0077] For the yield stress value measurement, the gel viscosity values ​​at 1.0 rpm (R1) and 0.5 rpm (R2) were measured respectively, and the yield stress value was calculated using the formula: yield stress value=(R2-R1) / 100.

[0078] Electrochemical cells can be tested according to the methods of the American National Standards Institute (ANSI). For example, plotted in figure 1 and 5 ANSI data in correspond to tests conducted according to ANSI C18.1M, Part 1-2009 and are plotted a...

Embodiment A

[0105] Embodiment A. A gelled anode for an alkaline electrochemical cell, the anode comprising: zinc-based particles, an alkaline electrolyte, a gelling agent, and two or more selected from the group consisting of Additives: Alkali metal hydroxides, organophosphate surfactants, metal oxides and tin.

Embodiment B

[0106] Embodiment B. The gelled anode of Embodiment A, comprising an alkali metal hydroxide, wherein the alkali metal hydroxide is lithium hydroxide.

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Abstract

A gelled anode for an alkaline electrochemical cell contains zinc-based particles, an alkaline electrolyte, a gelling agent, and two or more additives selected from the group consisting of alkali metal hydroxides, organophosphate surfactants, metal oxides, and tin which reduce cell gassing characteristics relative to cells without such additives.

Description

[0001] This application is a divisional application for an invention patent application with application number 201680027139.2. The application date of the original application is May 12, 2016, and the name of the invention is: Alkaline battery with improved discharge efficiency. technical field [0002] The present technology generally relates to the field of zinc anodes for electrochemical cells. Specifically, the technology relates to zinc anodes with improved reliability and discharge performance. Background technique [0003] The anode discharge efficiency of alkaline batteries depends on the availability of sufficient anode reaction sites. This can be achieved by using more zinc fines to increase the surface area per unit weight of the zinc or by reducing the apparent density of the zinc powder. However, the net increase in zinc surface area with the addition of zinc fines results in high cell gassing and can cause reduced battery capacity and earlier leakage of alkal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/06H01M6/06H01M4/42H01M4/62
CPCH01M4/06H01M4/42H01M4/62H01M6/06H01M6/085H01M2004/023Y02E60/10H01M4/364H01M4/38
Inventor M·E·阿马坎基W·李D·R·克罗A·J·罗什科夫斯基J·哈德利J·罗斯
Owner ENERGIZER BRANDS