Mobility of water molecules in Li+, Na+ and Cs+ ionic forms of Nafion membrane studied by NMR |
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| Institution: | 1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432 Chernogolovka, Moscow Region, Russian Federation;2. Scientific Center in Chernogolovka, Russian Academy of Sciences, 142432 Chernogolovka, Moscow Region, Russian Federation |
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| Abstract: | Correlation times and diffusion coefficients of water molecules were measured for the first time by 1H spin relaxation and pulsed field gradient NMR in Li+, Na+ and Cs+ ionic forms of Nafion 117 membrane. Hydration numbers of Li+, Na+ and Cs+ cations were calculated. It was shown that at high humidity macroscopic transfer is controlled by the local translational motion of water molecules. |
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| Keywords: | Nafion membrane hydration number water diffusion correlation time |
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