| Auteur | Rechercher : Adachi, M.1; Rechercher : Navessin, T.1; Rechercher : Xie, Z.1; Rechercher : Holdcroft, S.1 |
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| Affiliation | - Conseil national de recherches du Canada. Institut d'innovation en piles à combustible du CNRC
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| Format | Texte, Article |
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| Conférence | 238th National Meeting and Exposition of the American Chemical Society, ACS 2009, August 16-20, 2009, Washington, DC, USA |
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| Sujet | ionomers; proton exchange membrane fuel cells (PEMFC); perfluorosulfonic acid |
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| Résumé | Water permeability at 70°C is determined for Nafion® NRE211 membrane exposed to either liquid or vapour phases of water. Chemical potential gradients of water across the membrane are controlled through use of differential humidity (38-100% RH) in the case of water vapour and hydraulic pressure (0-1.2 atm) in the case of liquid water. Accordingly, three types of water permeation are defined: vapour-vapour permeation (VVP), liquid-vapour permeation (LVP) and liquid-liquid permeation (LLP). The difference in chemical potentials across the membrane, and the flux of water is determined. Water permeability measurements obtained ex-situ are compared to fuel cell water balance measurements obtained in-situ. It is found that the magnitude of back-transport of water during fuel cell operation can be explained by considering that the membrane is exposed to liquid on one side and vapour on the other, i.e., LVP conditions. |
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| Date de publication | 2009 |
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| Maison d’édition | ACS |
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| Dans | |
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| Série | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 23004843 |
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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 | 339403a3-1e4c-47e8-a2bc-0686207ba6bc |
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| Enregistrement créé | 2019-01-03 |
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| Enregistrement modifié | 2020-04-16 |
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