Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 7689-7701 |
| Seitenumfang | 13 |
| Fachzeitschrift | International Journal of Hydrogen Energy |
| Jahrgang | 37 |
| Ausgabenummer | 9 |
| Publikationsstatus | Veröffentlicht - Mai 2012 |
| Extern publiziert | Ja |
Abstract
Dehydration phenomena in a PEM fuel cell were investigated by nonlinear frequency response analysis (NFRA) in a differential H2/H2 cell. The linear H1,0 spectra, which are equal to classic EIS spectra, showed not only an increase of the membrane resistance but also an increase of the anode reaction resistance, caused by dehydration leading to the decrease of the protonic conductivity of the polymer network in the catalyst layer. With this, active sites with long protonic pathes to the membrane become inactive. In order to further clarify this effect, modelling work was used. Therefore, proton transport was incorporated into an existing model of a differential H2/H2 cell. Finally, the key features of NFRA spectra under dehydration and CO poisoning are compared in order to discuss the suitability of NFRA for unambiguous diagnosis of PEMFC. It can be seen that while the linear spectrum is not sufficient to distinguish between both cases, the second order frequency response functions can be used for discrimination.
Schlagwörter
- Dehydration, Electrochemical impedance spectroscopy, Nonlinear frequency response analysis, Polymer electrolyte membrane fuel cell, Proton transport, PEM fuel cell
ASJC Scopus Sachgebiete
- Energie (insg.)
- Erneuerbare Energien, Nachhaltigkeit und Umwelt
- Energie (insg.)
- Feuerungstechnik
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Energie (insg.)
- Energieanlagenbau und Kraftwerkstechnik
Ziele für nachhaltige Entwicklung
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in: International Journal of Hydrogen Energy, Jahrgang 37, Nr. 9, 05.2012, S. 7689-7701.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Nonlinear frequency response analysis of dehydration phenomena in polymer electrolyte membrane fuel cells
AU - Kadyk, Thomas
AU - Hanke-Rauschenbach, Richard
AU - Sundmacher, Kai
N1 - Copyright: Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2012/5
Y1 - 2012/5
N2 - Dehydration phenomena in a PEM fuel cell were investigated by nonlinear frequency response analysis (NFRA) in a differential H2/H2 cell. The linear H1,0 spectra, which are equal to classic EIS spectra, showed not only an increase of the membrane resistance but also an increase of the anode reaction resistance, caused by dehydration leading to the decrease of the protonic conductivity of the polymer network in the catalyst layer. With this, active sites with long protonic pathes to the membrane become inactive. In order to further clarify this effect, modelling work was used. Therefore, proton transport was incorporated into an existing model of a differential H2/H2 cell. Finally, the key features of NFRA spectra under dehydration and CO poisoning are compared in order to discuss the suitability of NFRA for unambiguous diagnosis of PEMFC. It can be seen that while the linear spectrum is not sufficient to distinguish between both cases, the second order frequency response functions can be used for discrimination.
AB - Dehydration phenomena in a PEM fuel cell were investigated by nonlinear frequency response analysis (NFRA) in a differential H2/H2 cell. The linear H1,0 spectra, which are equal to classic EIS spectra, showed not only an increase of the membrane resistance but also an increase of the anode reaction resistance, caused by dehydration leading to the decrease of the protonic conductivity of the polymer network in the catalyst layer. With this, active sites with long protonic pathes to the membrane become inactive. In order to further clarify this effect, modelling work was used. Therefore, proton transport was incorporated into an existing model of a differential H2/H2 cell. Finally, the key features of NFRA spectra under dehydration and CO poisoning are compared in order to discuss the suitability of NFRA for unambiguous diagnosis of PEMFC. It can be seen that while the linear spectrum is not sufficient to distinguish between both cases, the second order frequency response functions can be used for discrimination.
KW - Dehydration
KW - Electrochemical impedance spectroscopy
KW - Nonlinear frequency response analysis
KW - Polymer electrolyte membrane fuel cell
KW - Proton transport
KW - Dehydration
KW - Electrochemical impedance spectroscopy
KW - Nonlinear frequency response analysis
KW - Polymer electrolyte membrane fuel cell
KW - Proton transport
KW - PEM fuel cell
UR - http://www.scopus.com/inward/record.url?scp=84860282188&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2012.01.148
DO - 10.1016/j.ijhydene.2012.01.148
M3 - Article
AN - SCOPUS:84860282188
VL - 37
SP - 7689
EP - 7701
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 9
ER -