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Modelling of primary alkaline battery cathodes: a simplified model

Modelling of primary alkaline battery cathodes: a simplified model
Modelling of primary alkaline battery cathodes: a simplified model
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
0378-7753
645
Johansen, J.F.
00b8d8e5-fe8b-451d-85ba-fccc14c73934
Farrell, T.W.
f5c83285-a302-4dc3-b965-026cc9e69d3d
Please, C.P.
118dffe7-4b38-4787-a972-9feec535839e
Johansen, J.F.
00b8d8e5-fe8b-451d-85ba-fccc14c73934
Farrell, T.W.
f5c83285-a302-4dc3-b965-026cc9e69d3d
Please, C.P.
118dffe7-4b38-4787-a972-9feec535839e

Johansen, J.F., Farrell, T.W. and Please, C.P. (2006) Modelling of primary alkaline battery cathodes: a simplified model. Journal of Power Sources, 156 (2), 645. (doi:10.1016/j.jpowsour.2005.03.235).

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: June 2006

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Local EPrints ID: 146635
URI: http://eprints.soton.ac.uk/id/eprint/146635
ISSN: 0378-7753
PURE UUID: 4c274d65-3428-49c8-a85c-0f536205b9d4

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Date deposited: 21 Jun 2010 14:35
Last modified: 07 Jan 2022 23:46

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Contributors

Author: J.F. Johansen
Author: T.W. Farrell
Author: C.P. Please

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