| 电化学阻抗法测定金属氢化物电极中氢的扩散系数 |
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| 引用本文： | 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. |
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| 作者姓名： | 原鲜霞 徐乃欣 |
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| 作者单位： | 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 |
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| 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
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| 关 键 词： | 金属氢化物电极 氢的扩散系数 电化学阻抗法 |
| 文章编号： | 1006-3471(2001)03-0321-05 |
| 收稿时间： | 2001-08-28 |
| 修稿时间： | 2000年10月23 |
Determination of Hydrogen Diffusion Coefficient in Metal Hydride Electrode with Electrochemical Impedance Spectroscopy |
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| YUAN Xian xia,XU Nai xin.Determination of Hydrogen Diffusion Coefficient in Metal Hydride Electrode with Electrochemical Impedance Spectroscopy[J].Electrochemistry,2001,7(3):321-325. |
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| Authors: | YUAN Xian xia XU Nai xin |
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| 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. |
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| Keywords: | Metal hydride electrode Hydrogen diffusion coefficient Electrochemical impedance spectroscopy |
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