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@INPROCEEDINGS{Yang:1025143,
author = {Yang, Danan and Garg, Himani and Beale, Steven B. and
Andersson, Martin},
title = {{N}umerical {R}econstruction of {P}roton {E}xchange
{M}embrane {F}uel {C}ell {G}as {D}iffusion {L}ayers},
issn = {2151-2043},
reportid = {FZJ-2024-02720},
year = {2023},
abstract = {Flooding and dehydration reduce stability and power
performance in Proton Exchange Membrane Fuel Cells (PEMFCs).
The Gas Diffusion Layer (GDL) plays a crucial role in
facilitating reactant gas transport and removing product
water from the electrode. To suit various PEMFCs, GDLs with
different shapes have been commercialized. The impact of the
GDL structure on the surface-tension-driven water transport
behavior remains poorly understood. However, this is one
important aspect that can be controlled by proper design. In
this study, the GDL performance is investigated by comparing
curved and straight carbon fibers within the region.
Specifically, an image-processing method extracts porosity,
domain size, and fiber diameter from an experimental
image-based GDL reconstruction. These parameters are
utilized by in-house developed computer codes to
stochastically reconstruct curved and straight carbon fiber
GDLs, respectively. The real and reconstructed GDLs are
compared in terms of pore size distribution, tortuosity, and
permeability. Liquid transport in these GDLs and
corresponding gas channels is simulated using a volume of
fluid method in OpenFOAM 7.0.Figure 1(a) presents the
T-shaped simulation domain and top view of three GDLs.
Figure 1(b) displays the Cumulative Density Function (CDF)
of the pore size distribution for the three GDLs, revealing
that the main difference between the three GDLs lies in the
pore diameter range of 10-30 µm. Upon completion of the
research program, we aim to identify the influence of fiber
shape on the GDL transport properties as well as the water
behavior inside them.},
month = {May},
date = {2024-05-26},
organization = {The Electrochemical Society, San
Francisco (USA), 26 May 2024 - 30 May
2024},
cin = {IEK-13},
ddc = {540},
cid = {I:(DE-Juel1)IEK-13-20190226},
pnm = {1222 - Components and Cells (POF4-122) / 1231 -
Electrochemistry for Hydrogen (POF4-123)},
pid = {G:(DE-HGF)POF4-1222 / G:(DE-HGF)POF4-1231},
typ = {PUB:(DE-HGF)1},
doi = {10.1149/MA2023-02371718mtgabs},
url = {https://juser.fz-juelich.de/record/1025143},
}