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@ARTICLE{Kulikovsky:890254,
author = {Kulikovsky, Andrei},
title = {{PEM} fuel cell distribution of relaxation times: a method
for the calculation and behavior of an oxygen transport
peak},
journal = {Physical chemistry, chemical physics},
volume = {22},
number = {34},
issn = {1463-9084},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2021-00838},
pages = {19131 - 19138},
year = {2020},
abstract = {A simple numerical method for the calculation of the
distribution of relaxation times (DRT) for PEM fuel cell
impedance is developed. The method combines the Tikhonov
regularization technique and projected gradient iterations.
The method is illustrated by calculating DRT for the
synthetic impedance of two parallel RC-circuits and for
Warburg finite-length impedance. Finally, cathode catalyst
layer (CCL) impedance is calculated using the exact
analytical solution and the method discussed is applied to
understand the behavior of the DRT peak due to oxygen
transport in the CCL. The position of the oxygen transport
peak on the frequency scale exhibits non-monotonic behavior
as the oxygen diffusion coefficient in the CCL decreases,
which may serve as an indicator of CCL flooding. The Python
code for DRT calculation is available for download.},
cin = {IEK-14},
ddc = {540},
cid = {I:(DE-Juel1)IEK-14-20191129},
pnm = {135 - Fuel Cells (POF3-135)},
pid = {G:(DE-HGF)POF3-135},
typ = {PUB:(DE-HGF)16},
pubmed = {32808947},
UT = {WOS:000567772700032},
doi = {10.1039/D0CP02094J},
url = {https://juser.fz-juelich.de/record/890254},
}