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The Modelling of Primary Alkaline Battery Cathodes: A Simplified Model for porous manganese oxide particle discharge

The Modelling of Primary Alkaline Battery Cathodes: A Simplified Model for porous manganese oxide particle discharge
The Modelling of Primary Alkaline Battery Cathodes: A Simplified Model for porous manganese oxide particle discharge
A simplified model, to that produced previously by the authors, for the galvanostatic discharge of primary alkaline battery cathodes is presented. Laplace transform and perturbation methods are employed to obtain the leading order spatial and temporal behaviour of the porous cathode over two distinct size scales. It is shown that for a wide range of industrially relevant discharge conditions the time taken for KOH electrolyte to diffuse into a porous electrolytic manganese dioxide particle is fast compared with the cathodic discharge time and that ohmic losses within the graphite phase of the cathode can be considered to be negligible. Numerical solution of the simplified model equations is discussed and the results are validated against relevant experimental data.
A1930-A1941
Farrell, T.W.
f5c83285-a302-4dc3-b965-026cc9e69d3d
Please, C.P.
118dffe7-4b38-4787-a972-9feec535839e
Farrell, T.W.
f5c83285-a302-4dc3-b965-026cc9e69d3d
Please, C.P.
118dffe7-4b38-4787-a972-9feec535839e

Farrell, T.W. and Please, C.P. (2005) The Modelling of Primary Alkaline Battery Cathodes: A Simplified Model for porous manganese oxide particle discharge. Journal of Electrochemical Society, 152 (10), A1930-A1941. (doi:10.1149/1.2001528).

Record type: Article

Abstract

A simplified model, to that produced previously by the authors, for the galvanostatic discharge of primary alkaline battery cathodes is presented. Laplace transform and perturbation methods are employed to obtain the leading order spatial and temporal behaviour of the porous cathode over two distinct size scales. It is shown that for a wide range of industrially relevant discharge conditions the time taken for KOH electrolyte to diffuse into a porous electrolytic manganese dioxide particle is fast compared with the cathodic discharge time and that ohmic losses within the graphite phase of the cathode can be considered to be negligible. Numerical solution of the simplified model equations is discussed and the results are validated against relevant experimental data.

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Published date: 2005

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Local EPrints ID: 29270
URI: http://eprints.soton.ac.uk/id/eprint/29270
PURE UUID: 59830e8c-0a26-4f6c-9916-4c78fda98a15

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Date deposited: 11 May 2006
Last modified: 08 Jan 2022 12:55

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Contributors

Author: T.W. Farrell
Author: C.P. Please

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