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实验研究了粉末粒度对贮氢合金Mm(NiCoAlMn) 5电化学性能的影响。在一定粒度范围内 ,合金粉越粗 ,其放电容量越大 ,倍率放电性能越好 ,循环寿命也越长。但是当平均粒度超过一定值时 ,则其放电容量却又会随粒径的增大而减小 ,混合粒径合金粉的放电容量比大径合金粉的放电容量要高。将两种不同粒度的合金粉混合使用时 ,粒径相差越大 ,堆积密度越高 ,其放电容量也就越高 ;不同配比的粗细贮氢合金粉当其质量比为 7∶3时 ,其放电容量最高。
The effect of particle size on the electrochemical performance of Mm (NiCoAlMn) 5 was studied experimentally. In a certain range of particle size, the thicker the alloy powder, the larger the discharge capacity, the better the rate discharge performance, the longer the cycle life. However, when the average particle size exceeds a certain value, the discharge capacity decreases with the increase of the particle size. The discharge capacity of the mixed particle size alloy powder is higher than the discharge capacity of the large diameter alloy powder. The two different particle size of alloy powder mixed use, the larger the particle size difference, the higher the bulk density, the higher the discharge capacity; different proportions of coarse hydrogen storage alloy powder when its mass ratio of 7: 3, Its discharge capacity is highest.