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Synchrotron-Radiographie und -Tomographie einer PEM-Brennstoffzelle

  • Henning Markötter , Tobias Arlt , John Banhart , Ingo Manke , Heinrich Riesemeier , Philipp Krüger , Jan Haußmann , Merle Klages und Joachim Scholta
Veröffentlicht/Copyright: 22. August 2013
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Abstract

Die dreidimensionalen Wasserverteilungen und -transportwege in den Gasdiffusionslagen (GDL) einer Polymer-Elektrolyt-Membran(PEM)-Brennstoffzelle werden bei verschiedenen Betriebsbedingungen analysiert. Die Methode der quasi In-situ-Röntgen-Tomographie wird für eine dreidimensionale Visualisierung der Wasserverteilung sowie der Struktur der GDL genutzt. Basierend auf Ergebnissen dynamischer radiographischer Messungen werden Wassertransportwege aufgefunden und anschließend mithilfe der Tomographie im Detail untersucht. Die Kombination dieser 2D- und 3D-Techniken erlaubt eine Identifizierung der Transportwege durch die GDL. zwei Mechanismen werden auf der Kathodenseite beobachtet: zum einen Wasser, das aus der GDL in den Kanal transportiert wird, und zum anderen Wasser, das in die GDL zurückgedrückt wird.

Abstract

The three dimensional water distribution and transport pathways in gas diffusion layers (GDL) of a polymer electrolyte membrane fuel cell (PEM FC) are analysed at various operating conditions. The method of quasi in-situ Xray tomography is used for a three dimensional visualization of the water distribution and the GDL structure. Based on the results of dynamic radiographic measurements water transport pathways are located and subsequently investigated in detail by means of tomography. The combination of 2D and 3D techniques allows for an identification of 3D transport pathways through the GDL.

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Online erschienen: 2013-08-22
Erschienen im Druck: 2013-05-02

© 2013, Carl Hanser Verlag, München

Heruntergeladen am 3.10.2025 von https://www.degruyterbrill.com/document/doi/10.3139/120.110445/html
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