Preparation and electrochemical properties of new composite hydrogen storage alloy Zr0.9Ti0.1(Ni, Co, Mn, V)2.1

Zr0.9Ti0.1(Ni, Co, Mn, V)2.1 as-cast alloy was prepared by melting under an argon atmosphere; and then, four composite alloy were prepared by ball-milling after adding hydrogen storage agent B. XRD results show that composite alloys become micro-crystalline or amorphous from crystalline with ball-milling time increasing; the electrochemical results indicate that composite alloys have a good active behavior, which can be active completely with one or two cycles. At 60mA/g current mass density, the stability capacities of C and D composite alloys could be up to 440 mA · h/g, which are 80 mA · h/g more than that of as-cast alloy; at 300 mA/g current mass density, the cycle stability of composite alloy D is worse than those of as-cast alloy and LaNi5 hydrogen storage.