TY  - JOUR
AU  - Reshetenko, Tatyana
AU  - Kulikovsky, Andrei
TI  - Nafion film transport properties in a low-Pt PEM fuel cell: impedance spectroscopy study
JO  - RSC Advances
VL  - 9
IS  - 66
SN  - 2046-2069
CY  - London
PB  - RSC Publishing
M1  - FZJ-2020-01097
SP  - 38797 - 38806
PY  - 2019
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000509401700051
DO  - DOI:10.1039/C9RA07794D
UR  - https://juser.fz-juelich.de/record/873912
ER  -