Electrochemical properties of Zr-V-Ni system hydrogen storage alloys

摘要

The electrochemical properties of Zr-V-Ni system hydrogen storage alloys were investigated. In ZrV_0.5Mn_0.3Ni_0.1T_0.1(T = Ni, Co, Fe, Al) system alloys, higher content of V and Mn(i.e. (V + Mn)/ AB_2 = 0.8) brings forth more stable hydrides which have lower electrochemical capacities at room temperature. Meanwhile Al is a hydride-stabilizing element as well. The above alloys all have a capacity of about 350 mAh· G~-1 by raising temperature to 328 K. The substitution of Ti for Zr obviously alleviated their hydride thermo- Dynamic stability for Zr-Ti-V-Ni system alloys.