The Effect of Electrodes’ Making Methods on the Electrochemical Performance of Nano-Ni(OH)₂

Abstract:

Nano-Ni(OH)₂ doped with special elements were prepared by supersonic co-precipitation method. Complex electrodes were prepared by immersion method and handwork method by mixing 8wt.% nickel hydroxides with commercial micro-size spherical nickel as the positive material of Ni-MH battery. The electrochemical performance and cyclic character affected by different electrodes’ making methods were characterized in this article. The result indicates that the discharge capacities of IM electrodes (IM electrodes mean electrodes made by handwork method) are higher than that of HM electrodes (HM electrodes mean electrodes made by handwork method). Furthermore, IM electrodes have better reversibility and higher charge efficiency than HM electrode, and lower charge potential and higher discharge plateau were also observed for IM electrodes. It's worth noting that the phenomenon is more obvious at high charge/discharge rate. When the discharge rate is 0.5C，the discharge capacity of IM electrode is higher 67.1 mAh•g ^-1 than that of HM electrode.

• Periodical: Applied Mechanics and Materials (Volume 79)
• Pages: 123-127
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.79.123
• Online since: July 2011
• Authors: H. Z. Zheng, Y. J. Zhu, Z. J. Zhang, X. R. Lin, Z. J. Zhou, X. C. Ye, S. G. Wu
• Keywords: Charge Efficiency, Discharge Capacities of Electrodes, Handwork Method, Immersion Method, Reversibility

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