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High-resolution neutron radiography of through-plane liquid water distribution in polymer electrolyte membrane and gas diffusion layer



Daniel S. Hussey, David L. Jacobson, Richard Fu, Ugur Pasaogullari, Takeshi Shiomi, Yuichiro Tabuchi


We re-investigate our previously studied water transport phenomena under nonisothermal conditions by measuring the through-plane liquid water distribution across PEFC components with the state-of-the-art high-resolution neutron radiography. A corrective procedure to eliminate artifacts arising from polymer electrolyte membrane (PEM) swelling in water thickness measurement is introduced for the first time. Presence of a water content gradient in the polymer electrolyte membrane was observed under large temperature gradient and high humidity conditions. Water distribution in gas diffusion layers (GDLs) was measured by replacing the PEM with a film of PTFE. The experiment yielded a pronounced liquid water peak at the PTFE interface.
Journal of the Electrochemical Society


Neutron Radiography, PEFC, Water Distribution
Created August 14, 2012, Updated February 19, 2017