Electrochemical Behaviors of Zn Anode in Carbonate-based Aqueous Solutions

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Abstract

Electrochemical behaviors of Zn in various concentrations of K2CO3 and KOH containing 5 M K2CO3 (M = mol dm−3) aqueous solutions (carbonate-based electrolytes) have been investigated. The electrochemical reactions of Zn in diluted K2CO3 and KOH containing 5 M K2CO3 were suppressed while they were activated in concentrated K2CO3. In the point of view of the ratio of the cathodic charge qc to the anodic qa and Zn oxidation current, 0.5 M KOH containing 5 M K2CO3 showed the best performance among all examined electrolytes. The dendritic growth of Zn was not observed during redox cycles in the carbonate-based electrolytes.

Journal

  • Electrochemistry

    Electrochemistry 83 (10), 864-866, 2015

    The Electrochemical Society of Japan

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