Co-Mo alloy electrodeposits and charge discharge cycling in alkaline batteries

Co-Mo electrodeposits increase the discharge capacity of LaNi5 hydride electrodes and improve their activation process. The electrochemical characteristics of Co-Mo electrodeposits compared with pure Co alone have been studied separately in order to evaluate their own properties. The long term charge-discharge cycling of Co-Mo electrodeposits as anodes in 6 N KOH, in the potential range corresponding to the hydrogen oxidation reaction, show much better peak currents, exchange current densities and high-rate dischargeability than Co for the anodic oxidation reaction at compositions close to Co3Mo. The remarkable stability of their characteristics up to 1880 cycles and the mild conditions in which they can be obtained suggest them as better additives than Co for metal hydride electrodes.