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

Electrochemistry Communications

Madeleine Odgaard¹  Luigi Osmieri²  Tatyana Reshetenko³  Günter Randolf⁴  Andrei Kulikovsky⁵  Alexey Serov⁶ 

[1] Corresponding authors.;GRandalytics, 2343 Oahu Avenue, Honolulu, HI 96822, USA;Hawaii Natural Energy Institute, University of Hawaii, Honolulu, HI 96822, USA;IRD Fuel Cells, LLC, 8500 Washington St. NE, Albuquerque, NM 87113, USA;National Renewable Energy Laboratory, Golden, CO 80401, USA;Pajarito Powder, LLC, 3600 Osuna Road NE, Suite 309, Albuquerque, NM 87109-4427, USA;

关键词: PEM fuel cell;    PGM-free electrode;    Proton conductivity;    Electron conductivity;    Impedance;    Modeling;   

DOI  :  

来源: DOAJ

【 摘 要 】

Impedance spectra of a PEM fuel cell with three Fe-N-C cathodes have been measured under the H2/N2 testing regime. The spectra have been fitted using a recently developed physics-based impedance model, which takes into account finite proton (σp) and electron (σe) conductivity of the oxygen-free cathode catalyst layer. Fitting allowed to extract numerical data for σp, σe, the double layer capacitance, and the inductance of cables used for measuring impedance spectra. The values of σp and σe 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.

【 授权许可】

Unknown