Properties of Zr-Ti-V-Mn-Ni hydride alloy

Six kinds of Zr-based hydride alloy were designed. XRD analyses show that the main phase of Zr1-x Ti-x - (NiCoMnV)(2.1) alloy is Laves C15 when x is between 0 and 0.5, but the more the content of Ti, the more the Laves C14 phases. The amount of Laves C14 can be up to the amount of Laves C15 after substituted V and Fe by V-Fe alloy in Zr-0.6-Ti-0.4(NiCoMnVFeCr)(1.7) alloy. The electrochemical measurements show that the discharge capacity of Zr0.9Ti0.1-(NiCoMnV)(2.1) electrode is about 340 mA . h/g at 60 mA/g, but with increasing the amount of Ti, the discharge capacity of alloy electrode abruptly decreases; at 300 mA/g current density, its K-r can be up to 91%. The discharge capacity of Zr-0.6-Ti-0.4-(NiCoMn(V-Fe)Cr)(1.62), alloy electrode is about 200 mA . h/g at first cycle, the maximum capacity is more than that of the electrode with pure V, and about 315 mA . h/g.