粉末粒度对贮氢合金Ml（NiCoMnTi）5电化学性能的影响

系统地研究了粉末粒度对贮氢合金Ｍｌ（ＮｉＣｏＭｎＴｉ）５电化学性能的影响。结果表明，在２００μｍ－〈３８．５μｍ的粒度范围内，合金粉超细，其放电容量就越高，高倍率放电性能就越好，循环稳定性就越佳；将两种不同粒度的合金粉混合使用时，两种合金粉的粒径相差较大，其放电容量越高，且当粗细粉质量比为７：３时，放电容量达到最高。

Effects of Particle Size on the Electrochemical Properties of the Ml (NiCoMnTi)_5 Hydrogen Storage Alloy

The effects of particle size on the electrochemical properties of the Ml(NiCoMnTi)5 hydrogen storage alloy have been systematically investigated. The results show that the smaller the particle size, the higher the discharge capacity and the better the high -rate-dischargeability and the cycling stability. If two types of powder with different particle sizes are mixed, the smaller the particle size ratio (the average particle size of small component to that of the large one), the higher the discharge capacity. At a mixing weight ratio (the weight of large component to that of the small one) of 7: 3, the highest discharge capacity is obtained.