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Through-Plane Permeability for Untreated and PTFE-Treated Gas Diffusion Layers in Proton Exchange Membrane Fuel Cells

[+] Author Affiliations
Mohammed Ismail, Kevin Hughes, Derek Ingham, Lin Ma, Mohamed Pourkashanian, Masli Rosli

University of Leeds, Leeds, UK

Paper No. FuelCell2009-85120, pp. 713-721; 9 pages
doi:10.1115/FuelCell2009-85120
From:
  • ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology
  • ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology
  • Newport Beach, California, USA, June 8–10, 2009
  • Conference Sponsors: Advanced Energy Systems Division
  • ISBN: 978-0-7918-4881-4 | eISBN: 978-0-7918-3847-1
  • Copyright © 2009 by ASME

abstract

The through-plane permeability has been experimentally measured for untreated and PTFE-treated gas diffusion layers (GDLs), as used in proton exchange membrane fuel cells. Contrary to what the literature has previously shown, the results suggest that there exists an optimum value for the wet-proofing agent, PTFE, at which the though-plane permeability of the GDL is a maximum. The analysis that is undertaken to investigate the effect of the air compressibility shows that there is an underestimation in the through-plane permeability of the tested GDLs by of the order of 9% if the density of the air is assumed to be constant. Also, a non-dimensionlisation analysis shows that ignoring the non-Darcy effects at the maximum reported flow rates results in negligible errors for the untreated and treated GDLs.

Copyright © 2009 by ASME

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