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@ARTICLE{Reshetenko:841346,
author = {Reshetenko, Tatyana and Kulikovsky, Andrei},
title = {{I}mpedance {S}pectroscopy {C}haracterization of {O}xygen
{T}ransport in {L}ow– and {H}igh–{P}t {L}oaded {PEM}
{F}uel {C}ells},
journal = {Journal of the Electrochemical Society},
volume = {164},
number = {14},
issn = {1945-7111},
address = {Pennington, NJ},
publisher = {Electrochemical Soc.},
reportid = {FZJ-2017-08431},
pages = {F1633 - F1640},
year = {2017},
abstract = {We report fitting of the physics–based model for the
cathode side impedance to the experimental spectra of
low–Pt loaded (0.1/0.1 mgPt cm− 2) and high–Pt loaded
(0.4/0.4 mgPt cm− 2) PEM fuel cells measured in the range
of current densities from 50 to 400 mA cm− 2. Fitting
allowed us to separate the oxygen diffusion coefficients in
the catalyst layer Dox and in the gas–diffusion layer Db,
and the respective mass transfer coefficients of the
electrodes of both types. In the low–Pt electrode, Dox is
an order of magnitude lower, than in the high–Pt
electrode; however, due to 4–fold difference in the
electrode thickness, the respective mass transfer
coefficients are close to each other. In both the
electrodes, the oxygen diffusion and the mass transfer
coefficients in the GDL are nearly the same and they are
much higher, than the respective coefficients in the CCLs.
The ORR Tafel slope and Dox exhibit linear growth with the
cell current density; both effects could be attributed to
“cleaning” of Pt surface from oxides at lower cell
potential.},
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:000419187700126},
doi = {10.1149/2.1131714jes},
url = {https://juser.fz-juelich.de/record/841346},
}