White Rose University Consortium logo
University of Leeds logo University of Sheffield logo York University logo

On the through-plane permeability of microporous layer-coated gas diffusion layers used in proton exchange membrane fuel cells

Ismail, MS, Borman, DJ, Damjanovic, T, Ingham, D and Pourkashanian, M (2010) On the through-plane permeability of microporous layer-coated gas diffusion layers used in proton exchange membrane fuel cells. International Journal of Hydrogen Energy. ISSN 0360-3199 (In Press)

Full text available as:

Abstract

The through-plane permeability has been experimentally measured for microporous layer (MPL)-coated gas diffusion layers (GDLs) as used in proton exchange membrane fuel cells (PEMFCs). Provided that the carbon substrate is maintained unchanged, the results show that the through-plane permeability of the tested GDLs increases with an increase in the quantity of PTFE in the MPL. The analysis that is undertaken to investigate the effect of the air compressibility on the through-plane permeability shows that there is an underestimation in the permeability by up to 11% if the density of the air is assumed to be constant. Neglecting the compressibility of the air does not have the same effect on the inertial coefficients of the tested GDLs as it is overestimated, or underestimated, depending upon the tested GDL. Also, a non-dimensionlisation analysis shows that the exclusion of the non-Darcy terms results in significant errors, especially at the reported maximum flow rates. Finally, the permeability of the MPLs was estimated and found to be 2-3 orders of magnitude lower than that of the corresponding carbon substrates.

Item Type: Article
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Process, Environmental and Materials Engineering (Leeds) > Centre for Computational Fluid Dynamics (Leeds)
Depositing User: Symplectic Publications
Date Deposited: 30 Jun 2011 12:36
Last Modified: 15 Sep 2014 03:59
Published Version: http://dx.doi.org/10.1016/j.ijhydene.2010.09.012
Status: In Press
Publisher: Elsevier
Identification Number: 10.1016/j.ijhydene.2010.09.012
URI: http://eprints.whiterose.ac.uk/id/eprint/42979

Actions (repository staff only: login required)