High resolution synchrotron X-ray investigation of carbon dioxide evolution in operating direct methanol fuel cells
- The carbon dioxide evolution and bubble formation in an operating fuel has been studied by means of synchrotron X-ray radiography. Two different observation directions have been chosen: a through-plane insight has been employed to track the formation of bubbles starting at the corner of the lands of the flow field; a depth profile of the carbon dioxide evolution has been derived from cross sectional studies describing an affected area of up to 100 µm. The dynamics of the bubble formation and detachment of the bubbles from the position of formation is strongly correlated with the current density. Cracks and breaks in the catalyst layer which result from the preparation process are visible under operating conditions and a possible swelling of the catalyst layer does not reach a complete vanishing of the cracks.
Autor*innen: | C. Hartnig, I. Manke, J. Schloesser, P. Krüger, R. Kuhn, Heinrich Riesemeier, K. Wippermann, J. Banhart |
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Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Electrochemistry communications |
Jahr der Erstveröffentlichung: | 2009 |
Verlag: | Elsevier |
Verlagsort: | Amsterdam |
Jahrgang/Band: | 11 |
Ausgabe/Heft: | 8 |
Erste Seite: | 1559 |
Letzte Seite: | 1562 |
Freie Schlagwörter: | Carbon dioxide evolution; Cross section; DMFC; In situ study; Synchrotron radiography; Through-plane |
DOI: | 10.1016/j.elecom.2009.05.047 |
ISSN: | 1388-2481 |
Verfügbarkeit des Dokuments: | Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access") |
Bibliotheksstandort: | Sonderstandort: Publica-Schrank |
Datum der Freischaltung: | 19.02.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 07.12.2009 |