Alkaline cell with improved reliability and discharge performance

A technology for alkaline batteries and battery cells, which is applied in the direction of alkaline batteries, alkaline battery electrodes, aqueous electrolyte batteries, etc., and can solve problems such as electrolyte leakage of battery cells, inhibition of discharge performance, impracticality, etc.

Active Publication Date: 2017-12-05
ENERGIZER BRANDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The hydrogen gas produced during the corrosion reaction can lead to the build-up of internal pressure of the battery cell and eventually the electrolyte leakage of the battery cel

Method used

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  • Alkaline cell with improved reliability and discharge performance
  • Alkaline cell with improved reliability and discharge performance
  • Alkaline cell with improved reliability and discharge performance

Examples

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[0075] In the examples given below, electrochemical cells of the present disclosure were tested for DSC performance, drop test amperage (before and after drop), gassing of partially discharged cells, gassing of undischarged cells, and state after storage . Gel anodes were prepared according to modifications of the present disclosure.

[0076] Gel viscosity was measured using a Brookfield digital viscometer and 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 yield stress value measurement, colloidal viscosity values ​​were measured at 1.0rpm (R1) and 0.5rpm (R2), and the yield stress value was calculated using the following formula: yield stress value=(R2-R1) / 100.

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Abstract

A negative electrode for an alkaline battery cell which includes zinc-based particles, wherein less than 20% of the zinc-based particles, by weight relative to the total zinc in the electrode, have a particle size of greater than about 150 micrometers, is provided. An alkaline electrochemical cell that includes the negative electrode and a method for reducing the gassing of the electrochemical cell is also provided.

Description

[0001] This application claims the benefit of US Provisional Application No. 62 / 104,265, filed January 16, 2015, the entire contents of which are hereby incorporated by application in their entirety. technical field [0002] The present technology generally relates to the field of zinc anodes for electrochemical cells. In particular, the technology relates to zinc anodes with improved reliability and discharge performance. Background technique [0003] Battery gassing is a normal event during battery charging and storage. In addition, the hydrogen gas generated during the corrosion reaction can increase the internal pressure of the battery cell, leading to electrolyte leakage and damage to the integrity of the battery cell. This process is called "deflation". Gas generation in alkaline cells during storage is the result of the formation of hydrogen gas within the anode compartment driven by reduction reactions on metallic impurities present in the anode. Gas generation is...

Claims

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Application Information

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IPC IPC(8): H01M4/24H01M4/42H01M4/62H01M4/02H01M10/24B22F1/052B22F1/06
CPCH01M4/244H01M4/42H01M4/62H01M4/628H01M2004/027H01M10/24B22F1/06B22F1/052H01M4/12H01M6/04H01M6/5072Y02E60/10Y02P70/50
Inventor M·E·阿马坎基李文J·哈德利M·亨克
Owner ENERGIZER BRANDS
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