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研究论文

电化学阻抗法测定金属氢化物电极中氢的扩散系数

  • 原鲜霞 ,
  • 徐乃欣
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  • 中国科学院上海冶金研究所!上海200050,中国科学院上海冶金研究所!上海200050

收稿日期: 2001-08-28

  修回日期: 2001-08-28

  网络出版日期: 2001-08-28

Determination of Hydrogen Diffusion Coefficient in Metal Hydride Electrode with Electrochemical Impedance Spectroscopy

  • YUAN Xian xia ,
  • XU Nai xin
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  • (Shanghai Institute of Metallurgy,Chinese Academy of Sciences,Shanghai,200050,China

Received date: 2001-08-28

  Revised date: 2001-08-28

  Online published: 2001-08-28

摘要

应用电化学阻抗法测定了不同荷电状态 (SOC)和不同温度下MlNi3.75Co0 .65Mn0 .4 Al0 .2 金属氢化物电极中氢的扩散系数 .结果表明 :室温下该电极中氢的扩散系数随其荷电量的增大而减小 ,SOC为 5 0 %时氢的扩散系数随温度的升高而增大 ,相应的氢扩散活化能为 35kJ/mo

本文引用格式

原鲜霞 , 徐乃欣 . 电化学阻抗法测定金属氢化物电极中氢的扩散系数[J]. 电化学, 2001 , 7(3) : 321 -325 . DOI: 10.61558/2993-074X.3262

Abstract

Electrochemical impedance spectroscopy was employed to determine the hydrogen diffusion coefficient in MlNi 3.75 Co 0.65 Mn 0.4 Al 0.2 metal hydride electrode with various states of charge(SOC) at room temperature and with 50% SOC at various temperatures. It was found that hydrogen diffusion coefficient in this electrode decreases with the increase in SOC at ambient temperature, and for the electrode with 50%SOC, hydrogen diffusion coefficient increases with the increase of temperature and the activation energy for hydrogen diffusion in it is 35 kJ/mol.

参考文献

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