Electrochemical investigations of activation and degradation of hydrogen storage alloy electrodes in sealed Ni/MH battery

摘要

The MlNi_4.0Co_0.6Al_0.4 alloy was treated with hot alkaline solution containing a small amount of KBH_4 and its effect on the activation and degradation behaviors of the hydrogen storage alloy electrodes in sealed Ni/MH batteries was investigated. It was found that the treated alloy electrode exhibited a better activation property than the untreated one in the sealed battery as well as in open cell. For the treated alloy electrode activating, the polarization resistance in the sealed battery was almost equal to that in the open cell.