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

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Author(s): Daniel S. Hussey; David L. Jacobson; Richard Fu; Ugur Pasaogullari; Takeshi Shiomi; Yuichiro Tabuchi;
Title: High-resolution neutron radiography of through-plane liquid water distribution in polymer electrolyte membrane and gas diffusion layer
Published: August 14, 2012
Abstract: 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.
Citation: Journal of the Electrochemical Society
Volume: 159
Pages: pp. 545 - 553
Keywords: Neutron Radiography; PEFC; Water Distribution
Research Areas: Fuel Cells, Neutron Physics, Instrumentation, Hydrogen