Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7719121 | International Journal of Hydrogen Energy | 2014 | 11 Pages |
Abstract
The dynamic behavior of liquid water transport through the gas diffusion layer (GDL) of the proton exchange membrane fuel cell is studied with an ex-situ approach. The liquid water breakthrough pressure is measured in the region between the capillary fingering and the stable displacement on the drainage phase diagram. The variables studied are GDL thickness, PTFE/Nafion content within the GDL, GDL compression, the inclusion of a micro-porous layer (MPL), and different water flow rates through the GDL. The liquid water breakthrough pressure is observed to increase with GDL thickness, GDL compression, and inclusion of the MPL. Furthermore, it has been observed that applying some amount of PTFE to an untreated GDL increases the breakthrough pressure but increasing the amount of PTFE content within the GDL shows minimal impact on the breakthrough pressure. For instance, the mean breakthrough pressures that have been measured for TGP-060 and for untreated (0Â wt.% PTFE), 10Â wt.% PTFE, and 27Â wt.% PTFE were 3589Â Pa, 5108Â Pa, and 5284Â Pa, respectively.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Mehdi Mortazavi, Kazuya Tajiri,