Kube, Alexander und Kopljar, Dennis und Wagner, Norbert und Friedrich, Kaspar Andreas (2022) Influence of Cycling onto Electrolyte Distribution Inside a Silver-Based Gas Diffusion Electrode for Zn-Air Batteries. ACS Sustainable Chemistry and Engineering. American Chemical society (ACS). doi: 10.1021/acssuschemeng.2c04542. ISSN 2168-0485.
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Offizielle URL: https://pubs.acs.org/doi/10.1021/acssuschemeng.2c04542
Kurzfassung
The understanding of the wetting behavior of gas diffusion electrodes (GDE) during operation is the key to developing gas diffusion electrodes with a stable triple-phase boundary and high electrochemical performance. In metal-air batteries, this is even more complex as the wide potential range during charge and discharge leads to several oxidation states with different molar volumes and wetting characteristics. In our work, we showed with a segmented cell the shift of current density to areas with less hydrostatic pressure for the oxygen reduction reaction and analyzed the hydrostatic pressure influence further with a cell enabling us to set the electrolyte pressure. We could also show the decrease of pore sizes and the influence of these smaller pores and higher wettability of the oxidized silver surface by using a pressure saturation setup. The knowledge of these findings offers the opportunity to design GDEs with lower tendency for flooding and therefore longer operation times.
elib-URL des Eintrags: | https://elib.dlr.de/192441/ | ||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||
Titel: | Influence of Cycling onto Electrolyte Distribution Inside a Silver-Based Gas Diffusion Electrode for Zn-Air Batteries | ||||||||||
Autoren: |
*DLR corresponding author | ||||||||||
Datum: | 13 Dezember 2022 | ||||||||||
Erschienen in: | ACS Sustainable Chemistry and Engineering | ||||||||||
Open Access: | Nein | ||||||||||
In SCOPUS: | Ja | ||||||||||
In ISI Web of Science: | Ja | ||||||||||
DOI: | 10.1021/acssuschemeng.2c04542 | ||||||||||
Verlag: | American Chemical society (ACS) | ||||||||||
ISSN: | 2168-0485 | ||||||||||
Stichwörter: | electrolyte distribution GDE wetting characteristics Zn-air battery liquid electrolyte distribution charge transport | ||||||||||
DLR - Schwerpunkt: | Energie | ||||||||||
DLR - Forschungsgebiet: | E VS - Verbrennungssysteme | ||||||||||
Standort: | Stuttgart | ||||||||||
Institute & Einrichtungen: | Institut für Technische Thermodynamik > Elektrochemische Energietechnik |
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