采用真空电弧熔炼和热处理方法制备了La1-xCexNi3.54Co0.78Mn0.35Al0.32(x=0.1,0.2,0.3,0.4,0.5,0.6)贮氢合金.X射线衍射(XRD)分析表明,合金含有单一CaCu5型六方结构相.电化学性能测试表明,随着x的增加,合金的最大放电容量从348.1mAh/g(x=0.1)单调地减小到310.1 mAh/g(x=0.6);HRD1200先从28.6%(x=0.1)增加到65.4%(x=0.5)然后降低到60.1%(x=0.6),归因于合金表面的电催化活性和合金体内氢原子扩散速率均随x的增大先增大后减小. La1-xCexNi3.54Co0.78Mn0.35Al0.32 (x = 0.1,0.2,0.3,0.4,0.5,0.6) hydrogen storage alloys were prepared by vacuum arc melting and heat treatment.XRD analysis showed that the alloy containing The single CaCu5 hexagonal structure phase shows that the maximum discharge capacity decreases monotonically from 348.1mAh / g (x = 0.1) to 310.1mAh / g (x = 0.6) as x increases with the increase of x. The HRD1200 First increased from 28.6% (x = 0.1) to 65.4% (x = 0.5) and then decreased to 60.1% (x = 0.6) due to the electrocatalytic activity of the alloy surface and hydrogen diffusion rate in the alloy both increasing with x Big first increase and then decrease.