Growth of zinc dendrites from the aqueous KOH solution

摘要

Ni-Zn alkaline accumulators have the big advantages in comparison with Ni-Cd or Ni-MH thanks to their high energy density, higher output voltage and thanks to ecological aspect. One of the biggest problems which limits the battery's life is dendritic growth, which proceeds during electro-deposition of dissolved zinc ions on the negative electrode. Suppression of growth of dendrites is possible mainly by usage of special additives in the electrolyte, which cause a homogenous distribution of current density or by choosing a suitable pulse charging mode. This article deals with the influence of pulse frequency on dendrites growth.