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@ARTICLE{Kulikovsky:828747,
author = {Kulikovsky, Andrei},
title = {{C}an {W}e {Q}uantify {O}xygen {T}ransport in the {N}afion
{F}ilm {C}overing an {A}gglomerate of {P}t/{C} {P}articles?},
journal = {Journal of the Electrochemical Society},
volume = {164},
number = {4},
issn = {1945-7111},
address = {Pennington, NJ},
publisher = {Electrochemical Soc.},
reportid = {FZJ-2017-02613},
pages = {F379 - F386},
year = {2017},
abstract = {We report a model of the cathode catalyst layer (CCL)
impedance, which includes impedances due to oxygen transport
in the Nafion film covering Pt/C agglomerates, and due to
oxygen transport through the CCL depth. In the case of small
cell current density, analytical solutions for the CCL
impedance Zccl are derived; for larger currents, we analyze
numerical solution for Zccl. The characteristic frequencies
of the oxygen transport through the Nafion film and through
the CCL depth are close to each other, and the contribution
of the Nafion film impedance ZN to Zccl is small up to the
current densities ≃ 100 mA cm− 2. This makes it
difficult reliable determination of ZN from experimental
spectra of a standard 10 μm–thick CCL. However, with the
decrease in the CCL thickness, the relative contribution of
ZN to Zccl increases. It gives us a chance to determine ZN
by fitting the models of this work to measured spectra of a
low–loaded MEA with a thin CCL. An example of fitting the
model to a synthetic numerical impedance is given.},
cin = {IEK-3},
ddc = {540},
cid = {I:(DE-Juel1)IEK-3-20101013},
pnm = {135 - Fuel Cells (POF3-135)},
pid = {G:(DE-HGF)POF3-135},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000400958600148},
doi = {10.1149/2.1261704jes},
url = {https://juser.fz-juelich.de/record/828747},
}