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dc.contributor.authorBessarabov, Dmitri
dc.contributor.authorShen, Jun
dc.contributor.authorZhou, Jianqin
dc.contributor.authorAstrath, Nelson G.C.
dc.contributor.authorNavessin, Titichai
dc.date.accessioned2012-10-29T12:17:44Z
dc.date.available2012-10-29T12:17:44Z
dc.date.issued2011
dc.identifier.citationShen, J. et al. 2011. Measurement of effective gas diffusion coefficients of catalyst layers of PEM fuel cells with a Loschmidt diffusion cell. Journal of power sources, 196(2):674-678. [https://doi.org/10.1016/j.jpowsour.2010.07.086]en_US
dc.identifier.issn0378-7753
dc.identifier.issn1873-2755 (Online)
dc.identifier.urihttp://hdl.handle.net/10394/7661
dc.identifier.urihttps://doi.org/10.1016/j.jpowsour.2010.07.086
dc.description.abstractIn this work, using an in-house made Loschmidt diffusion cell, we measure the effective coefficient of dry gas (O2–N2) diffusion in cathode catalyst layers of PEM fuel cells at 25 °C and 1 atmosphere. The thicknesses of the catalyst layers under investigation are from 6 to 29 μm. Each catalyst layer is deposited on an Al2O3 membrane substrate by an automated spray coater. Diffusion signal processing procedure is developed to deduce the effective diffusion coefficient, which is found to be (1.47 ± 0.05) × 10−7 m2 s−1 for the catalyst layers. Porosity and pore size distribution of the catalyst layers are also measured using Hg porosimetry. The diffusion resistance of the interface between the catalyst layer and the substrate is found to be negligible. The experimental results show that the O2–N2 diffusion in the catalyst layers is dominated by the Knudsen effect.en_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectEffective gas diffusion coefficienten_US
dc.subjectcathode catalyst layeren_US
dc.subjectPEM fuel cellsen_US
dc.subjectKnudsen effecten_US
dc.subjectLoschmidt diffusion cellen_US
dc.titleMeasurement of effective gas diffusion coefficients of catalyst layers of PEM fuel cells with a Loschmidt diffusion cellen_US
dc.typeArticleen_US
dc.contributor.researchID22730389 - Bessarabov, Dmitri Georgievich


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