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Effects of annealing treatment on the rare earth-based low-Co hydrogen storage alloy
Author(s): 
Pages: 32-35
Year: Issue:  3
Journal: TRANSACTIONS OF MATERIALS AND HEAT TREATMENT

Keyword:  低钴贮氢合金退火MH/Ni电池;
Abstract: 为提高多元替代低钴贮氢合金MlNi3.8 Al027 Mn0.36 Co0.24 Cu0.15 Cr0.1 Zn0.05 Fe0.05的电化学性能,研究了850℃与1050℃两种温度退火对合金的微观结构、组织以及电化学性能的影响.XRD分析表明,退火降低了合金的晶格应力和缺陷,同时使得合金的单胞体积增大.电化学测试结果表明,退火合金的放电容量明显提高,其中1050℃退火后合金的最大放电容量达到315mAh/g,比铸态合金提高26mAh/g.退火使得合金的高倍率放电性能略有降低,但仍达到96%,退火提高了合金的循环稳定性.
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