A quasi three-dimensional model for PEM fuel cell impedance: The effect of local oxygen depletion under the flow field rib

被引：0
|
作者：
Reshetenko, Tatyana [1 ]
Kulikovsky, Andrei [2 ,3 ]
机构：
[1] Univ Hawaii, Hawaii Nat Energy Inst, Honolulu, HI 96822 USA
[2] Forschungszentrum Julich, Inst Energy & Climate Res, Theory & Computat Energy Mat IEK 13, Julich, Germany
[3] Lomonosov Moscow State Univ, Res Comp Ctr, Moscow 119991, Russia
来源：
MATERIALS RESEARCH EXPRESS | 2023年 / 10卷 / 11期
关键词：
PEM fuel cell; impedance; modeling; GDL water content; LIQUID WATER SATURATION; GAS-DIFFUSION LAYERS; HIGH-CURRENT DENSITY; TRANSPORT RESISTANCE; LAND AREAS; COMPRESSION; PERFORMANCE; RESOLUTION; PRESSURE; NEUTRON;
D O I：
10.1088/2053-1591/ad09a6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Our previous 1d+1d model for PEM fuel cell impedance is extended to take into account 2d distribution of the oxygen concentration in the gas-diffusion layer under the flow field channel and rib. Fitting of the model impedance to the experimental spectra from the segmented PEMFC shows that in spite of nearly uniform GDL oxygen diffusivity, local oxygen concentration and current density exhibit strong decay under the rib (land). The effect is merely due to larger oxygen transport distance under the rib. The results demonstrate validity of local EIS for measuring 3D distribution of local current in an operating PEM fuel cell.
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页数：11
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