摘要
The hydrogen storage alloy electrode of Mm(NiCoMnAl) 5 was activated by etching the alloy in a hot concentrated KOH solution. The electrochemical measurement demonstrates that the modified alloy electrode can reach its stable capacity at the first charge/discharge cycle and also shows low overpotential, indicating full activation of the etched alloy material. It was found from ICP, SEM and EDAX analyses that the activation process leads to surface modification by reconstructing of a new electroactive surface.
The hydrogen storage alloy electrode of Mm(NiCoMnAl) 5 was activated by etching the alloy in a hot concentrated KOH solution. The electrochemical measurement demonstrates that the modified alloy electrode can reach its stable capacity at the first charge/discharge cycle and also shows low overpotential, indicating full activation of the etched alloy material. It was found from ICP, SEM and EDAX analyses that the activation process leads to surface modification by reconstructing of a new electroactive surface.
