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@PHDTHESIS{Dogan:1020760,
author = {Dogan, Deniz},
othercontributors = {Eichel, Rüdiger-A. and Mechler, Anna Katharina and Liauw,
Marcellus},
title = {{D}evelopment of a high-throughput test system for
continuous electrolysis processes},
school = {RWTH Aachen University},
type = {Dissertation},
address = {Aachen},
publisher = {RWTH Aachen University},
reportid = {RWTH-2025-09216},
pages = {1 Online-Ressource : Illustrationen},
year = {2025},
note = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
University; Dissertation, RWTH Aachen University, 2025},
abstract = {The demand for economically viable electrolysis processes
has increased significantly. The application of
high-throughput (HT) research represents an efficient
approach to significantly reduce development times. However,
existing HT platforms in electrochemistry typically support
only abstract experimental conditions or are limited to
specific processes, significantly restricting their
technological potential for research. This work introduces
an innovative HT test system for electrolysis processes,
developed in collaboration between the Institute of Energy
Technologies (IET-1, Forschungszentrum Jülich GmbH) and hte
GmbH. The system enables fully automated, simultaneous
screening in 16 parallel-operated flow cells. The extensive
system instrumentation and a specially developed cell
design, aligned with commercial standards, enable operation
under industrially relevant conditions. Furthermore, the
system is designed for high variability, supporting all
relevant low-temperature water or CO$_2$ electrolysis
processes and standard electrochemical measurement
techniques. In this thesis, scientific work packages were
conceptualized, executed, and analyzed that decisively
contributed to the development of the HT system. Validation
experiments are conducted on a single cell prototype to
validate main cell functions and configurations and to
identify optimization potentials. The implementation of a
four-terminal sensing method and application of precious
metal coatings to the current collectors improves measured
cell performance by 12.4 and 10.6 \%, respectively.
Additionally, the impact of further optimizations, such as
alternative current collector materials or reduced electrode
spacing, is discussed. Model-based stray current estimations
for the HT system with a common electrolyte supply for all
16 cells indicate that the total stray current can be
reduced from 187 to less than 2 mA under the tested
conditions. However, a comprehensive analysis reveals that
fully separated electrolyte circuits are preferable due to
various advantages. Corrosion studies with different
electrolytes on austenitic stainless steel reveal a high
contamination risk. Therefore, in the HT system only inert
polymers are used for electrolyte-contacting components.
Finally, main system functions are validated through the
operation of a 4-fold system prototype. The 4-fold study
demonstrates good reproducibility, with a standard deviation
of the cell voltage during alkaline water electrolysis of
only 14.7 mV at 500 mA/cm$^2$.},
cin = {155410 / 150000},
ddc = {540},
cid = {$I:(DE-82)155410_20140620$ / $I:(DE-82)150000_20140620$},
pnm = {iNEW2.0 - Verbundvorhaben iNEW2.0: Im Zentrum des
Inkubators Nachhaltige Elektrochemische
Wertschöpfungsketten (iNEW 2.0) steht die Erforschung und
Entwicklung neuartiger und leistungsfähiger
Elektrolyse-verfahren zur Anwendung in nachhaltigen
Power-to-X (P2X) Wertschöpfungsketten. (BMBF-03SF0627A)},
pid = {G:(DE-Juel1)BMBF-03SF0627A},
typ = {PUB:(DE-HGF)11},
doi = {10.18154/RWTH-2025-09216},
url = {https://publications.rwth-aachen.de/record/1020760},
}
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