由扩散阻抗过渡区求金属氢化物电极中氢扩散系数的不确定性(英文)

电化学（中英文） ›› 2002, Vol. 8 ›› Issue (1): 47-53.

由扩散阻抗过渡区求金属氢化物电极中氢扩散系数的不确定性(英文)

原鲜霞,徐乃欣

中国科学院上海冶金研究所,中国科学院上海冶金研究所上海200050 ,上海200050

收稿日期:2002-02-28 修回日期:2002-02-28 出版日期:2002-02-28 发布日期:2002-02-28

Uncertainty in Determination of Hydrogen Diffusion Coefficient in Metal Hydride Electrode Based on the Transition Region of Diffusion-controlled Impedance

YUAN Xian_xia * , XU Nai_xin

(Shanghai Institute of Metallurgy, Chinese Academy of Sciences, Shanghai 200050, China

Received:2002-02-28 Revised:2002-02-28 Published:2002-02-28 Online:2002-02-28

摘要/Abstract

摘要： 本文参照文献[1] 报导的利用扩散阻抗过渡区求金属氢化物电极中氢扩散系数的方法测定了MlNi3.75Co0 .6 5Mn0 .4 Al0 .2 电极中氢的扩散系数 .结果发现 :运算过程中由于所用到的一些函数具有周期性 ,使计算结果变为多解 ,而且这些解之间存在着数量级上的差别 ;对同一组实验数据 ,过渡区内依据不同频率点求得的扩散系数也很不同 .总之 ,该方法尚不成熟 ,有待于进一步完善

关键词: 金属氢化物电极, 氢的扩散系数

Abstract: Hydrogen diffusion coefficient in MlNi 3.75 Co 0.65 Mn 0.4 Al 0.2 metal hydride electrode has been determined with transition region of diffusion_controlled impedance.Multiple solutions were obtained at each data point because of the periodic characteristic of some functions used in the calculation,and the maximum difference between the solutions reached several orders of magnitude.On the other hand,the solutions varied for different data points in the transition region of diffusion_controlled impedance of the same experimental plot.It could be concluded that this method is not so well defined and some modification is required.

Key words: Metal hydride electrode, Hydrogen diffusion coefficient, Electrochemical impedance

中图分类号:

O646

原鲜霞,徐乃欣. 由扩散阻抗过渡区求金属氢化物电极中氢扩散系数的不确定性(英文)[J]. 电化学（中英文）, 2002, 8(1): 47-53.

YUAN Xian_xia * , XU Nai_xin . Uncertainty in Determination of Hydrogen Diffusion Coefficient in Metal Hydride Electrode Based on the Transition Region of Diffusion-controlled Impedance[J]. Journal of Electrochemistry, 2002, 8(1): 47-53.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://electrochem.xmu.edu.cn/CN/

https://electrochem.xmu.edu.cn/CN/Y2002/V8/I1/47

[1]	原鲜霞,徐乃欣. 恒电位阶跃法研究贮氢合金MlNi_(3.75)Co_(0.65)Mn_(0.4)Al_(0.2)中氢的扩散行为[J]. 电化学（中英文）, 2001, 7(4): 445-451.
[2]	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（中英文）, 2001, 7(3): 321-325.
[3]	南俊民, 杨勇, 李骏, 林祖赓. 金属氢化物电极表面处理方法及其表面氧化膜研究 Ⅰ.富镍表面处理及氧化膜的光电化学方法研究[J]. 电化学（中英文）, 1998, 4(1): 66-72.