分别用恒电位阶跃法、恒电流放电法和电化学阻抗法研究了不同荷电状态和不同温度下MlNi3.75Co0.65Mn0.4Al0.2贮氢合金电极中氢的扩散系数,并对各种方法的测试结果及其在实际应用中的优缺点进行了比较和讨论.测试结果表明,室温下MlNi3.75Co0.65Mn0.4Al0.2贮氢合金电极中氢的扩散系数随其荷电量的增大而减小;同一荷电状态的MlNi3.75Co0.65Mn0.4Al0.2贮氢合金电极中氢的扩散系数随温度的升高而增大;该电极中氢扩散的活化能为17.9kJ/mol～19.8kJ/mol.
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