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首页> 外文期刊>Chinese science bulletin >A comparison of iron phthalocyanine and cobalt porphyrin on the electrochemical catalysis in Ni-MH battery
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A comparison of iron phthalocyanine and cobalt porphyrin on the electrochemical catalysis in Ni-MH battery

机译：酞菁铁和卟啉钴在镍氢电池电化学催化中的比较

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摘要

The effects of iron phthalocyanine (FePc) and cobalt porphyrin (CoPp) on inner pressure and cycle behavior of sealed Ni-MH batteries were investigated in this study. The morphology of battery electrode was observed by SEM. The electrochemical impedance spectroscopy of floating-charge/discharge battery was also measured. Experimental results show that the addition of FePc or CoPp to the alloy electrode is an effective approach to decrease the internal pressure of battery during the process of charge and overcharge. In contrast to CoPp, the battery with FePc exhibits a slower capacity decay and a smaller overpotential at the same charge-discharge rate. As an electrocatalyst, FePc may more effectively speed up the reduction of oxygen, and decrease its reduction potential. As a result, the charge process is accelerated, the gas evolution is reduced and the pulverization of electrode materials is slowed down.
机译：本研究研究了铁酞菁（FePc）和钴卟啉（CoPp）对密封Ni-MH电池内部压力和循环行为的影响。通过SEM观察电池电极的形态。还测量了浮充/放电电池的电化学阻抗谱。实验结果表明，在合金电极中添加FePc或CoPp是降低充电和过充电过程中电池内部压力的有效方法。与CoPp相比，具有FePc的电池在相同的充放电速率下显示出较慢的容量衰减和较小的过电位。作为电催化剂，FePc可以更有效地加快氧气的还原速度，并降低其还原电位。结果，加速了充电过程，减少了气体逸出并且减慢了电极材料的粉碎。

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