Zhang, Qian und Schulze, Mathias und Gazdzicki, Pawel und Friedrich, Kaspar Andreas (2024) Temperature Reduction as Operando Performance Recovery Procedure for Polymer Electrolyte Mem-brane Fuel Cells. Energies, 17 (774). Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/en17040774. ISSN 1996-1073.
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Offizielle URL: https://www.mdpi.com/1996-1073/17/4/774
Kurzfassung
To efficiently mitigate the reversible performance degradation of polymer electrolyte membrane fuel cells, it is crucial to thoroughly understand recovery effects. In this work, the effect of operando performance recovery by temperature reduction is evaluated. The results reveal that operando reduction in cell temperature from 80 ◦C to 45 ◦C yields a performance recovery of 60–70% in the current density range below 1 A cm−2 in a shorter time (1.5 h versus 10.5 h), as opposed to a known and more complex non-operando recovery procedure. Notably, the absolute recovered voltage is directly proportional to the total amount of liquid water produced during the temperature reduction. Thus, the recovery effect is likely attributed to a reorganization/rearrangement of the ionomer due to water condensation. Reduction in the charge transfer and mass transfer resistance is observed after the temperature reduction by electrochemical impedance spectroscopy (EIS) measurement. During non-operando temperature reduction (i.e., open circuit voltage (OCV) hold during recovery instead of load cycling) an even higher recovery efficiency of >80% was achieved.
elib-URL des Eintrags: | https://elib.dlr.de/202741/ | ||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||
Titel: | Temperature Reduction as Operando Performance Recovery Procedure for Polymer Electrolyte Mem-brane Fuel Cells | ||||||||||||||||||||
Autoren: |
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Datum: | 6 Februar 2024 | ||||||||||||||||||||
Erschienen in: | Energies | ||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||
Gold Open Access: | Ja | ||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||
Band: | 17 | ||||||||||||||||||||
DOI: | 10.3390/en17040774 | ||||||||||||||||||||
Verlag: | Multidisciplinary Digital Publishing Institute (MDPI) | ||||||||||||||||||||
ISSN: | 1996-1073 | ||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||
Stichwörter: | durability; irreversible degradation; operando recovery; polymer electrolyte membrane fuel cells; reversible degradation | ||||||||||||||||||||
HGF - Forschungsbereich: | Energie | ||||||||||||||||||||
HGF - Programm: | Materialien und Technologien für die Energiewende | ||||||||||||||||||||
HGF - Programmthema: | Chemische Energieträger | ||||||||||||||||||||
DLR - Schwerpunkt: | Energie | ||||||||||||||||||||
DLR - Forschungsgebiet: | E SP - Energiespeicher | ||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | E - Elektrochemische Prozesse | ||||||||||||||||||||
Standort: | Stuttgart | ||||||||||||||||||||
Institute & Einrichtungen: | Institut für Technische Thermodynamik > Elektrochemische Energietechnik | ||||||||||||||||||||
Hinterlegt von: | Gazdzicki, Dr. Pawel | ||||||||||||||||||||
Hinterlegt am: | 29 Mai 2024 14:52 | ||||||||||||||||||||
Letzte Änderung: | 12 Jun 2024 13:02 |
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