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Investigation of Water Transport in Perforated Gas Diffusion Layer by Neutron Radiography
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2013
Year
Water BreakthroughChemical EngineeringNeutron RadiographyWater TransportLaser Perforation TechniqueEngineeringMembrane TechnologyEnvironmental EngineeringDiffusion ResistanceLiquid Water DistributionNeutron SourceProton-exchange MembraneCeramic MembraneWater TreatmentTransport PhenomenaMembrane PermeationNeutron TransportNeutron Scattering
The influence of gas diffusion layer (GDL) modifications by laser perforation technique on fuel cell water management is investigated in this study. The liquid water distribution in membrane-electrode-assembly (MEA) and water breakthrough in GDL are visualized using high resolution neutron radiography. The perforated GDL reduces water transport resistance, enhances water breakthrough in GDL, and promotes uniform water distribution in MEA. The observed effects account for the improved fuel cell performance caused by the perforated GDL.