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@ARTICLE{Hoppe:892694,
author = {Hoppe, Eugen and Janßen, Holger and Müller, Martin and
Lehnert, Werner},
title = {{T}he impact of flow field plate misalignment on the gas
diffusion layer intrusion and performance of a
high-temperature polymer electrolyte fuel cell},
journal = {Journal of power sources},
volume = {501},
issn = {0378-7753},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2021-02272},
pages = {230036 -},
year = {2021},
abstract = {Tolerances in the production process of flow field plates
for polymer electrolyte fuel cells (PEFCs) and the assembly
of single cells and stacks can lead to a misalignment among
the flow field plates. Due to clamping and misalignment,
shear stresses can be forced on the membrane electrode
assembly (MEA). Furthermore, the gas diffusion layer (GDL)
intrudes into the channel. In this study, five different
degrees of misalignment (0 to ) are applied to a fuel cell
model consisting of two flow field plates with five adjacent
channels each (1 mm width) and an MEA in between them. For
each degree, the MEA is compressed by about $30\%$ and 3D
images (tomograms) are recorded using an X-ray computer
tomograph (CT). Analyzing the cross-section of the channels,
the maximum intrusion depth varies for each channel.
Furthermore, the shape of the membrane becomes ever more
wavelike, with increasing misalignment and the position of
the maximum intrusion depth shifts sideways from the center
of the channel. Additionally, high-temperature polymer
electrolyte fuel cell (HT-PEFC) single cell experiments are
carried out. Two degrees of misalignment are set (normal
assembly and ). The performances of both degrees of
misalignment are within $5\%$ at a power density of 0.24
W.cm$^{-2}$.},
cin = {IEK-14},
ddc = {620},
cid = {I:(DE-Juel1)IEK-14-20191129},
pnm = {134 - Electrolysis and Hydrogen (POF3-134) / 1231 -
Electrochemistry for Hydrogen (POF4-123)},
pid = {G:(DE-HGF)POF3-134 / G:(DE-HGF)POF4-1231},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000659060900002},
doi = {10.1016/j.jpowsour.2021.230036},
url = {https://juser.fz-juelich.de/record/892694},
}