Performance and Impedance of a Partially Flooded Cathode Catalyst Layer in a Low-Platinum Polymer Electrolyte Membrane Fuel Cell

被引：0
|
作者：
Kulikovsky, Andrei [1 ,2 ]
机构：
[1] Forschungszentrum Julich, Inst Energy & Climate Res, Theory & Computat Energy Mat IEK 13, D-52425 Julich, Germany
[2] Lomonosov Moscow State Univ, Res Comp Ctr, Moscow 119991, Russia
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2023年 / 170卷 / 09期
关键词：
Low-Pt PEM fuel cell; impedance; flooding; modeling; OXYGEN-TRANSPORT; NAFION FILM; RESISTANCE; IMPACT; MODEL;
D O I：
10.1149/1945-7111/acf39f
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 performance and impedance of a partially flooded cathode catalyst layer (CCL) in a low-platinum PEM fuel cell is developed. The CCL is modeled by a system of cylindrical pores approximating real pore-size distribution in the electrode. The model includes oxygen transport along the pores and through the ionomer film covering Pt/C agglomerates. Part of the pore domain adjacent to the membrane is allowed to be flooded. Fitting of the model to experimental impedance spectra of a low-platinum PEM fuel cell shows 30%-40% CCL flooding. Flooding effectively reduces the CCL volume available for current conversion, thereby lowering the limiting current density due to oxygen transport through the ionomer film.
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页数：7
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