Optimisation of active material for positive electrodes of NiCd accumulators

Abstract

The conditions for the preparation of the active material for positive plastic-bonded electrodes of NiCd alkaline accumulators were investigated in order to obtain the maximum discharge capacity. It was shown that nickel hydroxide precipitated from a neutral medium is superior to that precipitated from a strongly alkaline medium. This, together with the choice of a conducting component and other conditions of preparation served as a basis for obtaining an active material which does not require an additional doping, e.g., with cobalt, its discharge capacity being comparable with the “classical” active materials doped with cobalt.