DOI | Trouver le DOI : https://doi.org/10.1016/j.jpowsour.2012.07.003 |
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Auteur | Rechercher : Li, Hui1; Rechercher : Zhang, Shengsheng1; Rechercher : Qian, Weimin1; Rechercher : Yu, Yi1; Rechercher : Yuan, Xiao-Zi1; Rechercher : Wang, Haijiang1; Rechercher : Jiang, Max1; Rechercher : Wessel, Silvia; Rechercher : Cheng, Tommy T. H. |
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Affiliation | - Conseil national de recherches du Canada. Énergie, les mines et l'environnement
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Format | Texte, Article |
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Sujet | Charge transfer; Chloride contamination; Electrochemical surface area; Mass transfer; PEM fuel cells |
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Résumé | Chloride contaminated fuel and/or air streams in an operating proton exchange membrane fuel cell can cause significant adverse effects on fuel cell performance and durability. This paper reports investigations of chloride contamination effects on PEM fuel cell performance and durability under a wide range of operating conditions, using various in-situ diagnostic measurements. Increases in current density and Cl− concentration as well as decreases in fuel cell RH were found to enlarge the severity of the chloride contamination effect. Temperature was also found to have a significant influence on the contamination effect. Electrochemical impedance spectroscopy was used as a diagnostic tool during the contamination tests to explore changes in cell component resistances. The results indicated that chloride contamination causes predominantly an increase in charge transfer resistance as well as an increase in mass transfer resistance. The membrane resistance was not found to be impacted by chloride contamination. As measured by cyclic voltammetry, the presence of chloride in the air stream significantly reduced the cathode electrochemical surface area, and this reduction is believed to be due to the adsorption of chloride on the Pt surface causing active site blockage and accelerated Pt dissolution and agglomeration via the formation of Pt–Cl complexes. |
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Date de publication | 2012-11-15 |
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Dans | |
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Langue | anglais |
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Publications évaluées par des pairs | Oui |
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Identificateur | S0378775312011172 |
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Numéro NPARC | 21268802 |
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Exporter la notice | Exporter en format RIS |
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Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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Identificateur de l’enregistrement | ef813b85-e04d-49b1-ba7b-c0c1481ed72e |
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Enregistrement créé | 2013-11-13 |
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Enregistrement modifié | 2020-04-21 |
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