Impedance of the hydrogen polymer fuel cell electrode. Theory and experiments

被引：6

作者：

Kjelstrup, S ^{[1
]}

Pugazhendi, P

Bedeaux, D

机构：

[1] Norwegian Univ Sci & Technol, Fac Chem & Biol, Dept Chem, N-7491 Trondheim, Norway

[2] Leiden Univ, Leiden Inst Chem, NL-2300 RA Leiden, Netherlands

来源：

ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS | 2000年 / 214卷 / 07期

关键词：

proton transport; surface polarization; irreversible thermodynamics;

D O I：

10.1524/zpch.2000.214.7.895

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We derive the impedance for the hydrogen electrode in the polymer membrane fuel cell from irreversible thermodynamics. The results predict a surface contribution to the cell impedance that can give two semi-circles in the Nyquist diagram. The equivalent circuit of the impedance is shown. The high-frequency contribution is connected to the oscillation of dipoles consisting of free charges in the surface, while the low-frequency contribution is connected to the electrochemical reaction. This can be explained by a slowly relaxing proton conducting polymer network at the reaction site.

引用

页码：895 / 916

页数：22

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