Abstract
Methanol crossover in proton-conducting polyphosphazene membranes was investigated using polymer electrolyte fuel cells. The transport of methanol through a membrane from the lower chamber of the cell to the upper chamber was conducted by molecular diffusion through the polymer structure. It is found that the methanol diffusion coefficients of phenyl phosphonic acid functionalized poly[aryloxyphosphazene] membranes in an aqueous methanol solution were 40 times lower than that of Nafion and 10-20 times lower with respect to sulfonated polyphosphazene membranes.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 192-196 |
| Number of pages | 5 |
| Journal | Materials Letters |
| Volume | 52 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jan 2002 |
| Externally published | Yes |
Keywords
- Diffusion coefficients
- Methanol crossover
- Polymer electrolyte fuel cells
- Polyphosphazene electrolyte membranes
ASJC Scopus subject areas
- Materials Science(all)
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Cite this
Fedkin, M. V., Zhou, X., Hofmann, M. A., Chalkova, E., Weston, J. A., Allcock, H. R., & Lvov, S. N. (2002). Evaluation of methanol crossover in proton-conducting polyphosphazene membranes. Materials Letters, 52(3), 192-196. https://doi.org/10.1016/S0167-577X(01)00391-3