Rechargeable alkaline silver-zinc cell with improved negative electrode

摘要

Substantial improvements to the cycle life of silverzinc cells were obtained by the addition of small amounts of bismuth oxide (Bi.sub. 2 O. sub.3) to the negative zinc electrode, in conjunction with cadmium oxide (CdO) and lead oxide (PbO). These improvements, which can be extended to other zinc-based alkaline batteries, especially nickel-zinc and zinc-air, can also be realized in conjunction with other metal oxides and hydroxides, particularly indium hydroxide [In(OH).sub.3 ], which, like Bi. sub.2 O.sub.3, has the additional advantage of being non- toxic.