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

Abstract

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 ($$σ_p$$) and electron ($$σ_e$$) conductivity of the oxygen-free cathode catalyst layer. Fitting allowed to extract numerical data for $$σ_p$$, $$σ_e$$, 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.

Authors:
; ; ; ; ORCiD logo; ORCiD logo
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); US Department of the Navy, Office of Naval Research (ONR)
OSTI Identifier:
1644215
Alternate Identifier(s):
OSTI ID: 1660202
Report Number(s):
NREL/JA-5900-77403
Journal ID: ISSN 1388-2481; S1388248120301466; 106795; PII: S1388248120301466
Grant/Contract Number:  
AC36-08GO28308; EE0008419
Resource Type:
Published Article
Journal Name:
Electrochemistry Communications
Additional Journal Information:
Journal Name: Electrochemistry Communications Journal Volume: 118 Journal Issue: C; Journal ID: ISSN 1388-2481
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
25 ENERGY STORAGE; PEM fuel cell; PGM-free electrode; proton conductivity; electron conductivity; impedance; modeling

Citation Formats

Reshetenko, Tatyana, Serov, Alexey, Odgaard, Madeleine, Randolf, Günter, Osmieri, Luigi, and Kulikovsky, Andrei. Electron and proton conductivity of Fe-N-C cathodes for PEM fuel cells: A model-based electrochemical impedance spectroscopy measurement. Netherlands: N. p., 2020. Web. https://doi.org/10.1016/j.elecom.2020.106795.
Reshetenko, Tatyana, Serov, Alexey, Odgaard, Madeleine, Randolf, Günter, Osmieri, Luigi, & Kulikovsky, Andrei. Electron and proton conductivity of Fe-N-C cathodes for PEM fuel cells: A model-based electrochemical impedance spectroscopy measurement. Netherlands. https://doi.org/10.1016/j.elecom.2020.106795
Reshetenko, Tatyana, Serov, Alexey, Odgaard, Madeleine, Randolf, Günter, Osmieri, Luigi, and Kulikovsky, Andrei. Fri . "Electron and proton conductivity of Fe-N-C cathodes for PEM fuel cells: A model-based electrochemical impedance spectroscopy measurement". Netherlands. https://doi.org/10.1016/j.elecom.2020.106795.
@article{osti_1644215,
title = {Electron and proton conductivity of Fe-N-C cathodes for PEM fuel cells: A model-based electrochemical impedance spectroscopy measurement},
author = {Reshetenko, Tatyana and Serov, Alexey and Odgaard, Madeleine and Randolf, Günter and Osmieri, Luigi and Kulikovsky, Andrei},
abstractNote = {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 ($σ_p$) and electron ($σ_e$) conductivity of the oxygen-free cathode catalyst layer. Fitting allowed to extract numerical data for $σ_p$, $σ_e$, 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.},
doi = {10.1016/j.elecom.2020.106795},
journal = {Electrochemistry Communications},
number = C,
volume = 118,
place = {Netherlands},
year = {2020},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1016/j.elecom.2020.106795

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