论文部分内容阅读
研究了热处理对 Ml (Ni Co Mn Al) 4 .76合金电化学性能的影响。结果表明 :在 1 1 73K～ 1 373K下适当的热处理可以显著提高贮氢合金电极的放电容量和高倍率放电性能 ;铸态合金的放电容量为 31 0 Ah/kg,放电电流密度 id=30 0 A/kg时 ,高倍率放电率 H RD30 0 =91 % ,id =1 2 0 0 A/kg时 ,H RD12 0 0 =35% ;经 1 1 73K,1 0 h热处理的合金容量提高到 32 7Ah/kg,H RD30 0 提高到 97% ;经 1 1 73K,3h热处理的合金容量为 2 99Ah/kg,H RD30 0 提高到 98% ,H RD12 0 0 提高到 65% ;随热处理温度的升高和时间的延长 ,导致合金电极的放电容量和高倍率放电性能下降。
The effect of heat treatment on the electrochemical properties of Ml (Ni Co Mn Al) 4 .76 alloy was investigated. The results show that the proper heat treatment at 1 1 73K ~ 1 373K can significantly improve the discharge capacity and high rate discharge performance of the hydrogen storage alloy electrode. The discharge capacity of the as-cast alloy is 31 0 Ah / kg and the discharge current density is id = 30 0 A / kg, the rate of high rate discharge H RD30 0 = 91%, id = 1200 A / kg, H RD12 0 0 = 35%; after 1 1 73K, 10 h heat treatment alloy capacity increased to 32 7Ah / kg, and H RD30 0 increased to 97%. The heat-treated alloy after 1 1 73K, 3h had a capacity of 2 99 Ah / kg, H RD30 0 increased to 98% and H RD12 0 0 increased to 65% High and prolonged time lead to the discharge capacity of alloy electrodes and high rate discharge performance decline.