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Zinc electrodeposit morphology under conditions of fluctuating current density

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Abstract

Previous investigations have shown that particles within a fluidized bed electrode undergo rapid fluctuations in overpotential. This investigation is concerned with the effects of such fluctuations on zinc electrodeposit morphology. Both a fluidized bed electrode and a rotating disc electrode were used, with the latter being driven at either constant or fluctuating current density. The effect of the fluctuations on the morphology of 1-h deposits for neutral and acidic sulphate electrolytes was determined by examination under the scanning electron microscope. Both pure electrolytes and those containing additives (nickel, cobalt, antimony and a commercially available glue) were employed. Wide variation in microstructure was observed with the fluctuations having a marked effect. These results are partly explicable in terms of differing nucleating and growth rates of zinc crystallites.

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Author notes

  1. V. Jiricny

    Present address: Institute of Chemical Process Fundamentals, Czechoslovak Academy of Science, 16502, Praha 6 — Suchdol, Czechoslovakia

Authors and Affiliations

  1. Department of Materials Science and Mineral Engineering, University of California, 94720, Berkeley, CA, USA

    V. Jiricny & J. W. Evans

Authors
  1. V. Jiricny
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  2. H. Choi
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  3. J. W. Evans
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Jiricny, V., Choi, H. & Evans, J.W. Zinc electrodeposit morphology under conditions of fluctuating current density. J Appl Electrochem 17, 91–103 (1987). https://doi.org/10.1007/BF01009135

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  • DOI: https://doi.org/10.1007/BF01009135

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