Electrochemical Studies on LaNi5 − x Sn x Metal Hydride Alloys

Electrochemical studies were performed on with . We measured the effect of the Sn substituent on the kinetics of charge‐transfer and diffusion during hydrogen absorption and desorption, and the cyclic lifetimes of electrodes in 250 mAh laboratory test cells. We report beneficial effects of making small substitutions of Sn for Ni in on the performance of the metal hydride alloy anode in terms of cyclic lifetime, capacity, and kinetics. The optimal concentration of Sn in alloys for negative electrodes in alkaline rechargeable secondary cells was found to lie in the range .