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A new type of auxiliary electrode for alkaline zinc cells

✍ Scribed by J.M. Skowroński; Wł Rekść; K. Jurewicz

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
998 KB
Volume
23
Category
Article
ISSN
0378-7753

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✦ Synopsis

Auxiliary electrodes having a low hydrogen overpotential were prepared by electrodepositing active nickel onto chemically-metallized polypropylene fibre. They effectively overcame the problem of zinc anode shape change in alkaline electrolyte by dissolving residual zinc, which remained on the anode plates due to passivation and exhaustion of cathode capacity. Residual discharge with such an auxiliary electrode restores the balance of charge efficiencies. Polypropylene-nickel auxiliary electrodes with a very long lifespan can be made in various shapes and sizes. Their polarisation curves and the effect they have on the zinc anode discharge process are both illustrated.

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