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 distinc...

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Bibliographic Details
Published in:Journal of power sources Vol. 156; no. 2; pp. 645 - 654
Main Authors: Johansen, J.F., Farrell, T.W., Please, C.P.
Format: Journal Article
Language:English
Published: Lausanne Elsevier B.V 01-06-2006
Elsevier Sequoia
Subjects:
Applied sciences
Cathode
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Electrolytic manganese dioxide
Exact sciences and technology
Mathematical model
Perturbation methods
Primary alkaline battery
Primary alkaline battery
Perturbation methods
Mathematical model
Cathode
Electrolytic manganese dioxide
Manganese oxides
Perturbation method
Secondary cell
Laplace transformation
Electric batteries
Modeling
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Description
Summary: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.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2005.03.235