Preparation and Properties of New Vanadium-based Battery Alloy for Electric Vehicles

Pressure casting tests were carried out for the new vanadium-based battery alloy V₃TiNi_0.56Ce_0.2 used for electric vehicles at different ball milling speeds and time,and the hydrogen absorption and desorption property as well as the corrosion resistance were tested and analyzed.The results show that with increase of the ball milling speed and time,the maximum hydrogen adsorption of the alloy increases first and then decreases,and the corrosion potential presents a positive shift first and negative shift afterwards,meanwhile,the hydrogen absorption and desorption property coupled with the corrosion resistance of the alloy are first increased and then decreased.Compared with those of the alloy by 300 r/min of ball milling speed,the maximum hydrogen absorption and corrosion potential of the alloy obtained at 500 r/min of ball milling speed increases by 18.72% and positively shifts by 72 mV,respectively.Meanwhile,with the ball milling time extending from 0.5 h to 2 h,the maximum hydrogen absorption of the alloy can be increased by 25.52% and the corrosion potential positively shifts by 80 mV.The ball milling speed and time of the new vanadium-based battery alloy V₃TiNi_0.56Ce_0.2 are determined at 500 r/min and 2 h respectively.