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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

镍电极的固相掺杂及在非对称电容中的应用

苏岳锋; 吴锋; 包丽颖   

  1. 北京理工大学化工与环境学院国家高技术绿色材料发展中心, 北京 100081
  • 收稿日期:2004-03-19 修回日期:2004-06-25 出版日期:2005-03-20 网络出版日期:2005-03-20

Solid Adulterating in Nickel Electrodes and Its Application in Asymmetric Hybrid Capacitor

SU Yue-Feng; WU Feng; BAO Li-Ying   

  1. School of Chemical Engineering & the Environment; Beijing Institute of Technology; Laboratory of National Development Center of Hi-Tech Green Materials; Beijing 100081; China
  • Received:2004-03-19 Revised:2004-06-25 Published:2005-03-20 Online:2005-03-20

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摘要： 应用CoO、Zn粉对镍电极进行固相掺杂,电极经若干次充放电循环,Co、Zn元 素在Ni(OH)2颗粒表层以固溶体的形式富集,可优化活性物质表面的组成和结构,提高活性物 质表层的快速反应能力,从而使镍电极更适用于C／Ni(OH)2非对称电容器体系.实验结果表 明:在高倍率充放电条件下,掺杂10％CoO的镍电极,其容量为未掺杂电极的2倍;用5％的 Zn粉替代部分导电剂Ni粉,镍电极大电流条件下的循环性能和容量性质将明显改善.

关键词: 镍电极, 固相掺杂, 非对称电容

Abstract: For adulterating nickel electrode with CoO and Zn powders, layers of solid solute materials will be deposited on the surface of Ni(OH)2 after several charge-discharge cycles. This can optimize the
composing and configuration of active materials on surface of Ni(OH)2. Thus the nickel electrode is more suitable to work in C/Ni(OH)2 asymmetric hybrid capacitor system. This work shows that
in high rate discharge condition, the capacity of the nickel electrode adulterated with 10% CoO is 2 times of the capacity of the no adulterating electrode. If electron conductor, Ni powder is substituted
by 5% Zn powder in the electrode, the high power capacity and cycle performance of the nickel electrode can be improved.

Key words: nickel electrode, solid adulterating, asymmetric hybrid capacitor

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