Electron and proton conductivity of Fe-N-C cathodes for PEM fuel cells: A model-based electrochemical impedance spectroscopy measurement

被引：21

作者：

Reshetenko, Tatyana ^{[1
]}

Serov, Alexey ^{[2
]}

Odgaard, Madeleine ^{[3
]}

Randolf, Gunter ^{[4
]}

Osmieri, Luigi ^{[5
]}

Kulikovsky, Andrei ^{[6
,7
]}

机构：

[1] Univ Hawaii, Hawaii Nat Energy Inst, Honolulu, HI 96822 USA

[2] Pajarito Powder LLC, 3600 Osuna Rd NE,Suite 309, Albuquerque, NM 87109 USA

[3] IRD Fuel Cells LLC, 8500 Washington St NE, Albuquerque, NM 87113 USA

[4] GRandalytics, 2343 Oahu Ave, Honolulu, HI 96822 USA

[5] Natl Renewable Energy Lab, Golden, CO 80401 USA

[6] Forschungszentrum Julich GmbH, Inst Energy & Climate Res, IEK Electrochem Proc Engn 14, D-52425 Julich, Germany

[7] Lomonosov Moscow State Univ, Res Comp Ctr, Moscow 119991, Russia

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2020年 / 118卷

关键词：

PEM fuel cell; PGM-free electrode; Proton conductivity; Electron conductivity; Impedance; Modeling; METAL-FREE CATALYSTS; LAYERS;

D O I：

10.1016/j.elecom.2020.106795

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Impedance spectra of a PEM fuel cell with three Fe-N-C cathodes have been measured under the H-2/N-2 testing regime. The spectra have been fitted using a recently developed physics-based impedance model, which takes into account finite proton (sigma(p)) and electron (sigma(e)) conductivity of the oxygen-free cathode catalyst layer. Fitting allowed to extract numerical data for sigma(p), sigma(e), the double layer capacitance, and the inductance of cables used for measuring impedance spectra. The values of sigma(p) and sigma(e) are close to what previously found for standard Pt/C electrodes, which is found for the first time using PGM-free catalysts. The method enables simultaneous measurement of reference proton and electron conductivity of PEMFC cathode.

引用

页数：5

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