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Challenges and limitations of accelerated stress testing in GDE half-cell set-ups

Title data

Loukrakpam, Rameshwori ; Ferreira Gomes Lobo, Bruna ; Prokop, Martin ; Bauer, Christof ; Kutter, Maximilian ; Baier, Felix ; Kempe, Rhett ; Roth, Christina:
Challenges and limitations of accelerated stress testing in GDE half-cell set-ups.
In: Journal of Power Sources. Vol. 569 (2023) . - 232905.
ISSN 0378-7753
DOI: https://doi.org/10.1016/j.jpowsour.2023.232905

Project information

Project title:
Project's official title
Project's id
Integriertes Graduiertenkolleg „Transport in strukturierten Materialien“ (MGK)
492723217

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

Commercialisation of proton exchange membrane fuel cells (PEMFCs) depends on accurate and high throughput durability testing at the laboratory scale. With the rotating disk electrode method (RDE) unable to mimic the three-phase boundary scenario in the membrane electrode assembly (MEA), gas diffusion electrode half-cells were proposed for fundamental catalysis research. However, durability testing in such half-cell setups under realistic operational conditions has been limited, and in particular, not yet validated against RDE or FC data. In this paper, an attempt is made to fill part of this knowledge gap by performing accelerated stress tests in thin films, gas diffusion electrodes and membrane electrode assemblies. The results are compared for two selected catalysts with different Pt loading, expected to show broad variations in their degradation behaviour. Accelerated stress tests (ASTs) were performed with various start/stop potentials and load cycles, and the oxygen reduction reaction (ORR) performance studied before and after the AST protocols. The internal resistance of the half-cell was found to be influenced most significantly by gas coverage and temperature changes on the working electrode and must be compensated accordingly. The applied vertex potentials for ASTs after compensation have to be accurate in order to induce the intended degradation phenomena.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry II > Chair Inorganic Chemistry II - Univ.-Prof. Dr. Rhett Kempe
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Electrochemical Process Engineering
Faculties > Faculty of Engineering Science > Chair Electrochemical Process Engineering > Chair Electrochemical Process Engineering - Univ.-Prof. Dr. Christina Roth
Research Institutions > Collaborative Research Centers, Research Unit > SFB 1585 - MultiTrans – Structured functional materials for multiple transport in nanoscale confinements
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 12 Apr 2023 08:21
Last Modified: 06 Feb 2024 05:56
URI: https://eref.uni-bayreuth.de/id/eprint/75889