Investigation of mass transport in gas diffusion layer at the air cathode of a PEMFC
2005 (English)In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 0019-4686, Vol. 51, no 3, 474-488 p.Article in journal (Refereed) Published
In a polymer electrolyte membrane fuel cell (PEMFC), slowdiffusion in the gas diffusion electrode may induce oxygen depletion when using air at the cathode. This work focuses on the behavior of a single PEMFC built with a Nafion® based MEA and an E-TEK gas diffusion layer and fed at the cathode with nitrogen containing 5, 10 and 20% of oxygen and working at different cell temperatures and relative humidities. The purpose is to apply the experimental impedance technique to cells wherein transport limitations at the cathode are significant. In parallel, a model is proposed to interpret the polarization curves and the impedance diagrams of a single PEMFC. The model accounts for mass transport through the gas diffusion electrode. It allows us to qualitatively analyze the experimental polarization curves and the corresponding impedance spectra and highlights the intra-electrode processes and the influence of the gas diffusion layer.
Place, publisher, year, edition, pages
2005. Vol. 51, no 3, 474-488 p.
Gas diffusion layer, Impedance, Mass transport, Modeling, PEMFC
IdentifiersURN: urn:nbn:se:kth:diva-10098DOI: 10.1016/j.electacta.2005.05.007ISI: 000233226100012ScopusID: 2-s2.0-26844505918OAI: oai:DiVA.org:kth-10098DiVA: diva2:208232
QC 201011042009-03-162009-03-162010-11-04Bibliographically approved