Rechargeable Zinc electrode with calcium hydroxide in Alkaline management dioxide-zinc cells.

Abstract

The rechargeability performance of alkaline manganese dioxide - zinc cells has been studied by the addition and variation of the concentration of calcium hydroxide in the anode component of these cells. A remarkable improvement in the accumulated cyclic capacity of such cells is observed by adding calcium hydroxide to the anode in a molar ratio of Zn:Ca at 2:1 The improvement is explained dui to the formation of an alkali insoluble complex, calcium 'Anew; in the anode from the interaction of calcium hydroxide and soluble zincatc ions. This restricts the movement of the zinc ions within the anode cavity, and thus inhibits the formation of non-reversible haetcrolite in the cathode.