Limitations in the design of lead-acid cells with immobilized electrolyte

The paper discusses the consequences of using a porous separator which completely occupies the interelectrode space and immobilizes the electrolyte. Transport equations which have been derived for the separator region, assuming planar electrodes, are presented with both rigorous and approximate solu...

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Bibliographic Details
Published inJournal of power sources Vol. 13; no. 1; pp. 39 - 54
Main Authors Atlung, S., Fastrup, B.
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 01.01.1984
Elsevier Sequoia
Subjects
Applied sciences
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
Transport process
Transport equation
Acid electrolyte
Lead
Secondary cell
Porous material
Separator
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Summary:The paper discusses the consequences of using a porous separator which completely occupies the interelectrode space and immobilizes the electrolyte. Transport equations which have been derived for the separator region, assuming planar electrodes, are presented with both rigorous and approximate solutions for long and short periods of time. The results are used to calculate the separator thickness necessary to avoid acid depletion at the positive plate surface. The dependence of this thickness on the rated capacity of the plate, the discharge time, and the separator properties expressed by the porosity and the tortuosity factor is then discussed. It is shown that for a given discharge rate there is an upper limit for the positive plate capacity, which is determined by the above mentioned separator properties.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0378-7753
1873-2755
DOI:10.1016/0378-7753(84)80052-X