| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7720547 | International Journal of Hydrogen Energy | 2014 | 6 Pages |
Abstract
This work describes new features describing the mechanism of proton and water transport in ion conducting membranes used in Proton Exchange Membrane Fuel Cells. A combination of NMR diffusion measurements and AC conductivity measurements as a function of water content reveal enhanced mobility of protons and water in low equivalent weight 3M perfluorosulfonic acid membranes at low water content. It is proposed that this is a result of the close proximity of adjacent acid-bearing sidechains in the lower equivalent weight ionomers. This proximity allows more facile exchange of species from group to group.
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Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Manale Maalouf, Che-Nan Sun, Brandon Pyle, Michael Emery, Gregory M. Haugen, Steven J. Hamrock, Thomas A. Jr.,