A Model for Local Impedance of the Cathode Side of PEM Fuel Cell with Segmented Electrodes

被引：43
|
作者：
Kulikovsky, A. A. [1 ,2 ]
机构：
[1] Res Ctr Juelich, Inst Energy & Climate Res, Fuel Cells IEK 3, D-52425 Julich, Germany
[2] Moscow MV Lomonosov State Univ, Ctr Res Comp, Moscow 119991, Russia
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2012年 / 159卷 / 07期
关键词：
GAS-DIFFUSION ELECTRODES; CATALYST LAYER; ELECTROCHEMICAL IMPEDANCE; MASS-TRANSPORT; SPECTROSCOPY; OSCILLATIONS; PERFORMANCE; CHANNELS; PEFCS;
D O I：
10.1149/2.066207jes
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A model for impedance of the PEM fuel cell cathode including the effects of oxygen transport in the cathode catalyst layer, gas-diffusion layer and in the air channel is developed. The model confirms recent experimental result (I. Schneider et al., J. Electrochem. Soc., 154, B383 (2007)), showing that oxygen transport in the channel manifests itself as a low-frequency arc in the impedance spectrum. Furthermore, the model spectrum exhibits a sequence of closed loops due to the interference of the local and transported with the flow oxygen concentration disturbances. The mechanism of this effect is discussed. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.066207jes] All rights reserved.
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页码：F294 / F300
页数：7
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