In this paper, the effect of small amounts of added elements, Cr, Co and Al
on the electrode properties of Ti3Ni2 hydrogen storage alloy was investiga
ted, including the discharge capacity, cycling life and high rate discharge
ability, etc. The relation between high rate discharge capacity, apparent
exchange current and apparent hydrogen diffusion coefficient were also inve
stigate. The results show that at , room temperature, the high rate dischar
ge ability and cycling life are improved by the addition of Cr and Al. Incr
easing the environment temperature promotes the increase of discharge capac
ity and worsens the cycling life. At 353 K, there are two discharge plateau
s on the discharge curves for all used alloys. (C) 2001 Elsevier Science B.
V. All rights reserved.