| Author | Search for: Adachi, M.1; Search for: Navessin, T.1; Search for: Xie, Z.1; Search for: Holdcroft, S.1 |
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| Affiliation | - National Research Council of Canada. NRC Institute for Fuel Cell Innovation
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| Format | Text, Article |
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| Conference | 238th National Meeting and Exposition of the American Chemical Society, ACS 2009, August 16-20, 2009, Washington, DC, USA |
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| Subject | ionomers; proton exchange membrane fuel cells (PEMFC); perfluorosulfonic acid |
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| Abstract | 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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| Publication date | 2009 |
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| Publisher | ACS |
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| In | |
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| Series | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 23004843 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 339403a3-1e4c-47e8-a2bc-0686207ba6bc |
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| Record created | 2019-01-03 |
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| Record modified | 2020-04-16 |
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