Yuan, Xiao-Zi und Zhang, Shengsheng und Ban, Shuai und Huang, Cheng und Wang, Haijiang und Singara, Vengatesan und Fowler, Michael und Schulze, Mathias und Haug, Andrea und Friedrich, K. Andreas und Hiesgen, Renate (2012) Degradation of a PEM fuel cell stack with Nafion® membranes of different thicknesses. Part II: Ex situ diagnosis. Journal of Power Sources, 205, Seiten 324-334. Elsevier. doi: 10.1016/j.jpowsour.2012.01.074. ISSN 0378-7753.
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Kurzfassung
Part I of this study carried out membrane electrode assembly degradation of a four-cell stack with Nafion membranes of different thicknesses, including N117, N115, NR212, and NR211, for 1000 h under idle conditions. Through on-line electrochemical measurements it was found that as degradation advanced, cells with thinner membranes experienced much more rapid performance degradation than those with thicker membranes, especially after 800 h of operation, due to a dramatic increase in hydrogen crossover. In the present work we investigate the degradation mechanisms of this four-cell stack using several ex situ diagnostic tools, including scanning electron microscopy (SEM), infrared (IR) imaging, ion chromatography (IC), gas permeability measurement, contact angle measurement, and simulation. The results indicate that the drastic increase in hydrogen crossover is due to membrane thickness loss and pinhole formation.
elib-URL des Eintrags: | https://elib.dlr.de/76829/ | ||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||
Titel: | Degradation of a PEM fuel cell stack with Nafion® membranes of different thicknesses. Part II: Ex situ diagnosis | ||||||||||||||||||||||||
Autoren: |
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Datum: | 2012 | ||||||||||||||||||||||||
Erschienen in: | Journal of Power Sources | ||||||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||
Band: | 205 | ||||||||||||||||||||||||
DOI: | 10.1016/j.jpowsour.2012.01.074 | ||||||||||||||||||||||||
Seitenbereich: | Seiten 324-334 | ||||||||||||||||||||||||
Verlag: | Elsevier | ||||||||||||||||||||||||
ISSN: | 0378-7753 | ||||||||||||||||||||||||
Stichwörter: | Proton exchange membrane fuel cell, Stack, Durability, Idle conditions Degradation | ||||||||||||||||||||||||
DLR - Schwerpunkt: | Energie | ||||||||||||||||||||||||
DLR - Forschungsgebiet: | E EV - Energieverfahrenstechnik | ||||||||||||||||||||||||
Standort: | Stuttgart | ||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Technische Thermodynamik > Elektrochemische Energietechnik |
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