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应用不同的快淬速度制取成分为MmNi3.5Co0.75Mn0.55Al0.2的贮氢合金,并做了电化学充放电循环实验,比较了它们的电化学活化速度、放电容量、放电电压性能以及电化学循环稳定性。冷却速度越高,合金的电化学循环稳定性越好、放电电压平台越平坦,放电电压也稍高,但导致放电容量下降,初期活化困难。
The hydrogen storage alloys with the composition of MmNi3.5Co0.75Mn0.55Al0.2 were prepared by using different quenching speeds. The electrochemical cycling experiments were carried out. Their electrochemical activation rates, discharge capacities, discharge voltage properties and Electrochemical cycle stability. The higher the cooling rate, the better the stability of the electrochemical cycle of the alloy. The more flat the discharge voltage platform is, the higher the discharge voltage is. However, the discharge capacity is reduced and the initial activation is difficult.