Ettingshausen, F. ; Kleemann, J. ; Michel, M. ; Quintus, M. ; Fuess, H. ; Roth, C. (2009)
Spatially resolved degradation effects in membrane-electrode-assemblies of vehicle aged polymer electrolyte membrane fuel cell stacks.
In: Journal of Power Sources, 194 (2)
doi: 10.1016/j.jpowsour.2009.06.003
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
State of the art MEAs were aged in a fuel cell vehicle and degradation effects analyzed using electron microscopy and electrochemical methods. All cells of the stack showed a performance decay along with a loss in the electrochemical surface area. This could be correlated to particle growth and carbon corrosion observed by electron microscopy. Spatially resolved investigations showed a significant deterioration of the cathode, which is particularly pronounced at the hydrogen inlet. Differences in the cell performance of the aged cells could not be attributed to a variation in the catalyst degradation, but are linked to an altered ohmic resistance in the cells. The ohmic resistance of the cells is likely to be affected by the formation of precipitates in the membrane and seems to be correlated with their size.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2009 |
| Autor(en): | Ettingshausen, F. ; Kleemann, J. ; Michel, M. ; Quintus, M. ; Fuess, H. ; Roth, C. |
| Art des Eintrags: | Bibliographie |
| Titel: | Spatially resolved degradation effects in membrane-electrode-assemblies of vehicle aged polymer electrolyte membrane fuel cell stacks |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Dezember 2009 |
| Verlag: | Elsevier Science Publishing Company |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Power Sources |
| Jahrgang/Volume einer Zeitschrift: | 194 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.1016/j.jpowsour.2009.06.003 |
| Kurzbeschreibung (Abstract): | State of the art MEAs were aged in a fuel cell vehicle and degradation effects analyzed using electron microscopy and electrochemical methods. All cells of the stack showed a performance decay along with a loss in the electrochemical surface area. This could be correlated to particle growth and carbon corrosion observed by electron microscopy. Spatially resolved investigations showed a significant deterioration of the cathode, which is particularly pronounced at the hydrogen inlet. Differences in the cell performance of the aged cells could not be attributed to a variation in the catalyst degradation, but are linked to an altered ohmic resistance in the cells. The ohmic resistance of the cells is likely to be affected by the formation of precipitates in the membrane and seems to be correlated with their size. |
| Freie Schlagworte: | TEM, Fuel cells, Degradation, Spatially resolved, Precipitates, Cell resistance |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Erneuerbare Energien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 22 Feb 2013 09:12 |
| Letzte Änderung: | 05 Mär 2013 10:05 |
| PPN: | |
| Sponsoren: | Financial support of the Federal Ministry of Education and Research (BMBF “KONNEKT”) has been gratefully acknowledged. |
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