Abstract
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 
.