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

Tatyana Reshetenko; Alexey Serov; Madeleine Odgaard; Günter Randolf; Luigi Osmieri; Andrei Kulikovsky

doi:10.1016/j.elecom.2020.106795

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

Tatyana Reshetenko, Alexey Serov, Madeleine Odgaard, Günter Randolf, Luigi Osmieri, Andrei Kulikovsky

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

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 σ_p and σ_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.

Original language	English
Article number	106795
Journal	Electrochemistry Communications
Volume	118
DOIs	https://doi.org/10.1016/j.elecom.2020.106795
State	Published - Sep 2020
Externally published	Yes

Funding

This work was authored in part by Alliance for Sustainable Energy, LLC, the manager and operator of the National Renewable Energy Laboratory for the U.S. Department of Energy under Contract No. DE- AC36-08GO28308. The views expressed in the article do not necessarily represent the views of the DOE or the U.S. Government. TR, AS, MO gratefully acknowledge financial support from US DOE EERE ( DE-EE0008419 “ Active and Durable PGM-free Cathodic Electrocatalysts for Fuel Cell Application”). TR gratefully acknowledges funding from US Office of Naval Research ( N00014-19-1-2159 ).

Keywords

Electron conductivity
Impedance
Modeling
PEM fuel cell
PGM-free electrode
Proton conductivity

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.elecom.2020.106795

Cite this

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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 (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.",

keywords = "Electron conductivity, Impedance, Modeling, PEM fuel cell, PGM-free electrode, Proton conductivity",

author = "Tatyana Reshetenko and Alexey Serov and Madeleine Odgaard and G{\"u}nter Randolf and Luigi Osmieri and Andrei Kulikovsky",

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year = "2020",

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doi = "10.1016/j.elecom.2020.106795",

language = "English",

volume = "118",

journal = "Electrochemistry Communications",

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TY - JOUR

T1 - Electron and proton conductivity of Fe-N-C cathodes for PEM fuel cells

T2 - A model-based electrochemical impedance spectroscopy measurement

AU - Reshetenko, Tatyana

AU - Serov, Alexey

AU - Odgaard, Madeleine

AU - Randolf, Günter

AU - Osmieri, Luigi

AU - Kulikovsky, Andrei

PY - 2020/9

Y1 - 2020/9

N2 - 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.

AB - 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.

KW - Electron conductivity

KW - Impedance

KW - Modeling

KW - PEM fuel cell

KW - PGM-free electrode

KW - Proton conductivity

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DO - 10.1016/j.elecom.2020.106795

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SN - 1388-2481

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JO - Electrochemistry Communications

JF - Electrochemistry Communications

M1 - 106795

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

Abstract

Funding

Keywords

UN SDGs

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