Scheiba, Frieder ; Benker, Nathalie ; Kunz, Ulrike ; Roth, Christina ; Fuess, Hartmut (2008)
Electron microscopy techniques for the analysis of the polymer electrolyte distribution in proton exchange membrane fuel cells.
In: Journal of Power Sources, 177 (2)
doi: 10.1016/j.jpowsour.2007.11.085
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The polymer electrolyte distribution in PEMFC electrodes plays an important role for the catalyst utilization and various transport processes in the electrode. Moreover, its influence on the transport processes is not only limited to proton transport but it may also affect gas transport, electron conductivity and water management of the cell. However, experimental techniques to study the polymer electrolyte distribution are scarce. In this paper we present various approaches based on scanning electron microscopy (SEM) and transmission electron microscopy (TEM) to characterize the polymer electrolyte distribution. The methods presented include staining of the polymer electrolyte with heavy metal ions, energy dispersive X-ray (EDX) mapping and energy filtered imaging (EFI). Their use for the analysis of the polymer electrolyte distribution and electrode structure will be presented and current limitations of these techniques will be discussed.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2008 |
| Autor(en): | Scheiba, Frieder ; Benker, Nathalie ; Kunz, Ulrike ; Roth, Christina ; Fuess, Hartmut |
| Art des Eintrags: | Bibliographie |
| Titel: | Electron microscopy techniques for the analysis of the polymer electrolyte distribution in proton exchange membrane fuel cells |
| Sprache: | Englisch |
| Publikationsjahr: | 1 März 2008 |
| Verlag: | Elsevier Science Publishing Company |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Power Sources |
| Jahrgang/Volume einer Zeitschrift: | 177 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.1016/j.jpowsour.2007.11.085 |
| Kurzbeschreibung (Abstract): | The polymer electrolyte distribution in PEMFC electrodes plays an important role for the catalyst utilization and various transport processes in the electrode. Moreover, its influence on the transport processes is not only limited to proton transport but it may also affect gas transport, electron conductivity and water management of the cell. However, experimental techniques to study the polymer electrolyte distribution are scarce. In this paper we present various approaches based on scanning electron microscopy (SEM) and transmission electron microscopy (TEM) to characterize the polymer electrolyte distribution. The methods presented include staining of the polymer electrolyte with heavy metal ions, energy dispersive X-ray (EDX) mapping and energy filtered imaging (EFI). Their use for the analysis of the polymer electrolyte distribution and electrode structure will be presented and current limitations of these techniques will be discussed. |
| Freie Schlagworte: | PEMFC, Polymer electrolyte, Ionomer, Distribution, EF-TEM, EDX mapping, Microtomy |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften > Fachgebiet Umweltmineralogie 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Erneuerbare Energien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Physikalische Metallkunde 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 22 Feb 2013 08:26 |
| Letzte Änderung: | 05 Mär 2013 10:05 |
| PPN: | |
| Sponsoren: | Financial support from the DFG and the Sino-German Center in Beijing in a joint project between the ZAE Bayern (Garching, Germany), the School of Chemistry (Tsinghua University, Beijing, China),, and the Institute of Materials Science (Darmstadt University of Technology, Germany) are gratefully acknowledged. |
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