恒电位阶跃法研究贮氢合金MlNi_(3.75)Co_(0.65)Mn_(0.4)Al_(0.2)中氢的扩散行为

Study of Hydrogen Diffusion Behavior in Hydrogen Storage Alloy MlNi_(3.75)Co_(0.65) Mn_(0.4) Al_(0.2) with Potential Step Method

本文用恒电位阶跃法研究了不同放电深度 (DOD)和不同温度下贮氢合金MlNi3.75Co0 .6 5Mn0 .4 Al0 .2 中氢的扩散行为 .结果表明 :室温下该合金中氢的扩散系数随DOD的增大而增大 ,在5 0 %DOD的该合金中 ,氢的扩散系数随温度的升高而增大 ,扩散活化能为 19.

Potential step method was employed to study the hydrogen diffusion behavior in hydrogen storage alloy MlNi 3.75 Co 0.65 Mn 0.4 Al 0.2 with various depth of discharge(DOD) at ambient temperature and with 50%DOD at various temperatures. It was found that hydrogen diffusion cofficient in the hydrogen storage alloy increaes with the increase in DOD at ambient temperature. and for the alloy with 50%DOD,the hydrogen diffusion coefficient increases with the increase in temperature and the activation energy for hydrogen diffusion in the alloy is 19.87 kJ/mol.