电动汽车用新型钒基电池合金的制备与性能研究

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

采用不同的球磨转速和球磨时间对V3TiNi0.56Ce0.2电动汽车用新型钒基电池合金试样进行了压力铸造成型试验,并进行了吸放氢性能和耐腐蚀性能的测试与分析。结果表明:随球磨转速和球磨时间的增加,试样的最大吸氢量先增大后减小,腐蚀电位先正移后负移,吸放氢性能、耐腐蚀性能的变化趋势均为先提升再下降。与300 r/min球磨转速相比,500 r/min球磨转速下试样的最大吸氢量增大了18.72%,腐蚀电位正移了72 mV。与0.5 h球磨时间相比,2 h球磨时间使试样的最大吸氢量增大了25.52%,腐蚀电位正移了80 mV。V3TiNi0.56Ce0.2电动汽车用新型钒基电池合金的球磨转速和球磨时间分别优选为500 r/min和2 h。

Pressure casting tests were carried out for the new vanadium-based battery alloy V3TiNi0.56Ce0.2 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 V3TiNi0.56Ce0.2 are determined at 500 r/min and 2 h respectively.