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电化学(中英文) ›› 1996, Vol. 2 ›› Issue (4): 391-396. 

• 研究论文 • 上一篇    下一篇

微电极定量方法评价贮氢合金的电化学性质

胡蓉晖,杨汉西,刘金成,李升宪,查全性   

  1. 武汉大学化学系
  • 收稿日期:1996-11-28 修回日期:1996-11-28 出版日期:1996-11-28 发布日期:1996-11-28

Quantitative Evaluation of Electrochemical Properties of MH alloy by powder microelectrode

Hu Ronghui * Yang Hanxi Liu Jingcheng Li Shengxian Cha Chuanxin   

  1. (Department of Chemisry, Wuhan University, Wuhan 430072
  • Received:1996-11-28 Revised:1996-11-28 Published:1996-11-28 Online:1996-11-28

摘要: 本文介绍了评价贮氢合金电化学性能的粉末微电极定量方法.贮氢合金粉末微电极的电极厚度和半径仅几十微米,材料用量约几微克,从而降低了欧姆极化和液相浓度极化,排除了粘结剂等电极工艺对性能的影响.通过吸收光谱测定微电极中贮氢合金载量,结合循环伏安和恒电流阶跃法可以简便地测量贮氢合金负极的电化学性能.

关键词: 粉末微电极, 贮氢合金, 循环伏安, 电流阶跃

Abstract: In this paper, a quantitative method by use of powder microelectrode combined with cyclic voltammetry and galvanostatic step is described for studying the electrochemical performance characteristic of hydrogen storage alloy(MH). Since the powder microelectrode uses only MH powder and has its depth and diameter of several tens of micrometer, the ohmic and concentration ploarization are greatly reduced and the influences of the technical factors in electrode preparation on the material performance are simply eliminated. Thus, with accurate determination of the load quantity of MH alloy in power microelectrode by absorption spectrometric technique, it is feasible to evaluate quickly and quantitatively the electrochemical properties of MH alloy as negative electrode material.

Key words: Powder microelectrode, Hydrogen storage alloy, Cyclic voltammetry, Galvanostatic step

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