Ruiu, Tiziana und Dreizler, Andreas und Mitzel, Jens und Gülzow, Erich (2016) Evaluation of a 2.5 kWel automotive low temperature PEM fuel cell stack with extended operating temperature range up to 120 °C. Journal of Power Sources, 303, Seiten 257-266. Elsevier. doi: 10.1016/j.jpowsour.2015.10.056. ISSN 0378-7753.
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Offizielle URL: http://www.sciencedirect.com/science/article/pii/S0378775315304432
Kurzfassung
Nowadays, the operating temperature of polymer electrolyte membrane fuel cell stacks is typically limited to 80 °C due to water management issues of membrane materials. In the present work, short-term operation at elevated temperatures up to 120 °C and long-term steady-state operation under automotive relevant conditions at 80 °C are examined using a 30-cell stack developed at DLR. The high temperature behavior is investigated by using temperature cycles between 90 and 120 °C without adjustment of the gases dew points, to simulate a short-period temperature increase, possibly caused by an extended power demand and/or limited heat removal. This galvanostatic test demonstrates a fully reversible performance decrease of 21 ± 1% during each thermal cycle. The irreversible degradation rate is about a factor of 6 higher compared to the one determined by the long-term test. The 1200-h test at 80 °C demonstrates linear stack voltage decay with acceptable degradation rate, apart from a malfunction of the air compressor, which results in increased catalyst degradation effects on individual cells. This interpretation is based on an end-of-life characterization, aimed to investigate catalyst, electrode and membrane degradation, by determining hydrogen crossover rates, high frequency resistances, electrochemically active surface areas and catalyst particle sizes.
elib-URL des Eintrags: | https://elib.dlr.de/103126/ | ||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||
Titel: | Evaluation of a 2.5 kWel automotive low temperature PEM fuel cell stack with extended operating temperature range up to 120 °C | ||||||||||||||||||||
Autoren: |
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Datum: | 30 Januar 2016 | ||||||||||||||||||||
Erschienen in: | Journal of Power Sources | ||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||
Band: | 303 | ||||||||||||||||||||
DOI: | 10.1016/j.jpowsour.2015.10.056 | ||||||||||||||||||||
Seitenbereich: | Seiten 257-266 | ||||||||||||||||||||
Verlag: | Elsevier | ||||||||||||||||||||
ISSN: | 0378-7753 | ||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||
Stichwörter: | PEMFC stack, thermal cycling, long-term test, end-of-life characterization, degradation phenomena | ||||||||||||||||||||
HGF - Forschungsbereich: | Energie | ||||||||||||||||||||
HGF - Programm: | Speicher und vernetzte Infrastrukturen | ||||||||||||||||||||
HGF - Programmthema: | Brennstoffzellen | ||||||||||||||||||||
DLR - Schwerpunkt: | Energie | ||||||||||||||||||||
DLR - Forschungsgebiet: | E EV - Energieverfahrenstechnik | ||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | E - Elektrochemische Prozesse (Brennstoffzellen) (alt) | ||||||||||||||||||||
Standort: | Stuttgart | ||||||||||||||||||||
Institute & Einrichtungen: | Institut für Technische Thermodynamik > Elektrochemische Energietechnik | ||||||||||||||||||||
Hinterlegt von: | Ruiu, Dr. Tiziana | ||||||||||||||||||||
Hinterlegt am: | 23 Feb 2016 09:48 | ||||||||||||||||||||
Letzte Änderung: | 03 Nov 2023 08:05 |
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