Markötter, H.; Alink, R.; Haußmann, J.; Dittmann, K.; Arlt, T.; Wieder, F.; Tötzke, C.; Klages, M.; Reiter, C.; Riesemeier, H.; Scholta, J.; Gerteisen, D.; Banhart, J.; Manke, I.: Visualization of the water distribution in perforated gas diffusion layers by means of synchrotron X-ray radiography. International Journal of Hydrogen Energy 37 (2012), p. 7757-7761

Perforated gas diffusion layers (GDLs) of polymer electrolyte membrane fuel cells (PEMFCs) were investigated by means of in-situ synchrotron X-ray radiography during operation. We found a strong influence of perforations on the water distribution and transport in the investigated Toray TGP-H090 GDL. The water accumulates mainly around the perforations, while the holes themselves show varying water distributions. Some remain dry, while most of them fill up with liquid water after a certain period or might serve as drainage volume for effective water transport.