%0 Journal Article
%A Reshetenko, Tatyana
%A Kulikovsky, Andrei
%T Nafion film transport properties in a low-Pt PEM fuel cell: impedance spectroscopy study
%J RSC Advances
%V 9
%N 66
%@ 2046-2069
%C London
%I RSC Publishing
%M FZJ-2020-01097
%P 38797 - 38806
%D 2019
%X Unexpected over-linear transport loss in low-Pt PEM fuel cells has been a subject of numerous studies and discussions in literature. Most of the authors agree that these losses are due to oxygen transport in the Nafion film covering Pt/C agglomerates in the cathode catalyst layer (CCL). We develop a model for PEM fuel cell impedance, which takes into account oxygen transport through the film. The model is fitted to experimental impedance spectra of a low-Pt PEM fuel cell. Fitting gives the film thickness in the range of 10 to 13 nm, and the film transport resistivity decreasing from 1.2 s cm−1 to 0.2 s cm−1 as the cell current density increases from 50 to 800 mA cm−2. Fitting returns low value of the through-plane oxygen diffusivity in the CCL, indicating that the low-Pt electrode is partially flooded.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000509401700051
%R 10.1039/C9RA07794D
%U https://juser.fz-juelich.de/record/873912