贮氢合金电极电化学容量的评价方法

本文设计了三种电化学测试系统并进行金属氢化物电极电化学性能对比分析。结果表明,开口式三电极系统测出的放电容量明显高于夹片式和模拟电池所测出的放电容量,而夹片式电极系统测试的结果和模拟电池测试的结果比较一致。基于以上分析与实验结果,作者认为氢化物电极的电化学容量不仅与贮氢合金的本征因素有关,而且与电极制备工艺和电极的工作环境密切相关。

Evaluation of the Electrochemical Capacity of Metal Hydride Electrode Using Hydrogen Storage Alloys

For the determination of measurement methods on the performance of metal hydride electrode three different electrochemical apparatus were designed. The results showed that electrochemical capacity of a conventional three - electrode open cell was higher than that determined in a sandwiched and in a sealed Ni/MH test cell. It was bleieved that the electrochemical capacity of hydride electrode measured in the open sandwiched Ni/MH cell was very close to that in the sealed test cell. This makes the author believe that the electrochemical capacity of hydride electrode depended not only on the intrinsic properties of an hydrogen storage alloy,but also on the electrode preparation method and its working environment.