The Scientific Research Foundation

State of Israel, Ministry of Industry, Commerce and Tourism, National

Jonathan G Goldstein

Yitzchak Klein

The invention relates to an additive, to be added to conventional electrolytes of alkaline secondary zinc cells or to alkaline zinc plating baths, adapted to establish in said liquids a minimum concentration of 10.sup.-6 M per liter of cobalt ions and a minimum concentration of 5.10.sup.-6 M per liter of cadmium ions, said additive being a coprecipitate of cobalt hydroxide and cadmium hydroxide and either magnesium hydroxide or calcium hydroxide, to electrolytes for alkaline secondary zinc cells and alkaline zinc plating baths containing such additives and to a process for the production of such additives.

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Jerusalem, Israel

Jonathan G Goldstein