Bisello, Andrea und Colombo, Elena und Baricci, Andrea und Rabissi, Claudio und Guétaz, Laure und Gazdzicki, Pawel und Casalegno, Andrea (2021) Mitigated Start-Up of PEMFC in Real Automotive Conditions: Local Experimental Investigation and Development of a New Accelerated Stress Test Protocol. Journal of The Electrochemical Society, 168, 054501. Electrochemical Society, Inc.. doi: 10.1149/1945-7111/abf77b. ISSN 0013-4651.
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Offizielle URL: https://iopscience.iop.org/article/10.1149/1945-7111/abf77b
Kurzfassung
This study combines local electrochemical diagnostics with ex situ analysis to investigate degradation mechanism associated to start-up/shut-down (SU/SD) of PEMFC and mitigation strategies adopted in automotive stacks. Local degradation resulting from repeated SU/SD was analyzed with and without mitigation strategies by means of a macro-segmented cell setup provided with Reference Hydrogen Electrodes (RHEs) at both anode and cathode to measure local electrodes potential and current. Accelerated Stress Test (AST) for start-up with and without mitigation strategies are proposed and validated. A ten-fold acceleration of performance loss due to un-mitigated SU/SD has been calculated with respect to AST for catalyst support. Under mitigated SU/SD, instead, a strong degradation was observed as localized at cathode inlet region (i.e. −38% ECSA loss and −22 mV voltage loss after 200 cycles) due to local potentials transient reaching up to 1.5 V vs RHE. These localized stress conditions were additionally reproduced in a zero-gradient and a new AST protocol (named start-up AST) was proposed to mimic the potential profile observed upon SU/SD cycling. Representativeness of the start-up AST for real world degradation was confirmed up to 200 cycles. Platinum dissolution and diffusion/precipitation within the polymer electrolyte was shown to be the dominant mechanism affecting performance loss.
elib-URL des Eintrags: | https://elib.dlr.de/142336/ | ||||||||||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||||||||||
Titel: | Mitigated Start-Up of PEMFC in Real Automotive Conditions: Local Experimental Investigation and Development of a New Accelerated Stress Test Protocol | ||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 30 April 2021 | ||||||||||||||||||||||||||||||||
Erschienen in: | Journal of The Electrochemical Society | ||||||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||||||
Band: | 168 | ||||||||||||||||||||||||||||||||
DOI: | 10.1149/1945-7111/abf77b | ||||||||||||||||||||||||||||||||
Seitenbereich: | 054501 | ||||||||||||||||||||||||||||||||
Verlag: | Electrochemical Society, Inc. | ||||||||||||||||||||||||||||||||
ISSN: | 0013-4651 | ||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||
Stichwörter: | PEMFC, Fuel Cell, Durability, Start-Stop | ||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||||||
HGF - Programm: | Verkehr | ||||||||||||||||||||||||||||||||
HGF - Programmthema: | Straßenverkehr | ||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Verkehr | ||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | V ST Straßenverkehr | ||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | V - NGC Antriebssystem und Energiemanagement (alt) | ||||||||||||||||||||||||||||||||
Standort: | Stuttgart | ||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Technische Thermodynamik > Elektrochemische Energietechnik | ||||||||||||||||||||||||||||||||
Hinterlegt von: | Gazdzicki, Dr. Pawel | ||||||||||||||||||||||||||||||||
Hinterlegt am: | 20 Jul 2021 14:19 | ||||||||||||||||||||||||||||||||
Letzte Änderung: | 28 Jun 2023 14:00 |
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