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Investigations of the negative plate of lead/acid cells 3. Model calculations of the impedance of self-similar porous electrodes

Authors
Journal
Journal of Power Sources
0378-7753
Publisher
Elsevier
Publication Date
Volume
50
Identifiers
DOI: 10.1016/0378-7753(93)01888-o
Disciplines
  • Mathematics

Abstract

Abstract In this paper a model for the calculation of the admittance (reciprocal impedance) of a porous metal electrode is derived, under anodic constant-current conditions, during precipitation of an insoluble salt at the metal/electrolyte interface. An example of the discharge, at low current density, of the negative plate in a lead/sulphuric acid battery during which lead sulphate is formed. The discussion is based on the assumption that porosity has a self-similar fractal character. The impedance of fractal electrodes will be discussed in terms of geometrical and physical parameters.

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