|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Pan American Materials Congress: Materials for Green Energy
||Cycle Performance of Air Electrode and Metal Hydride/Air Secondary Battery
||Tsukasa Gejo, Kenji Kawaguchi,
|On-Site Speaker (Planned)
A metal hydride/air secondary battery works with water production during discharge and water decomposition during charge, so that the water management is one of the key issues to achieve a high cycleability. Especially, the air electrode needs to give active sites for oxygen reduction and evolution, which occur at the three-phase boundary consisted of the bi-functional oxygen catalyst, the concentrated alkaline solution, and air. The open pore for oxygen diffusion is maintained for charge-discharge cycling, and the optimization of the internal structure of the air electrode is quite important to give a high cycle performance. In this study, the cycle performance of the MH electrode, the air electrode, and the battery was examined, and the optimum structure of the air electrode concerning the water management was discussed with the detail analysis of the internal structure of the air electrode.
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