Udel polysulfone based membranes with 4-aminopyridine pendant groups and cross-linking imidazole units are synthesized in a simple two step reaction. The ratio of 4-aminopyridine and imidazole is varied and the materials are extensively characterized. The average phosphoric acid uptake (in 85 wt% PA) ranges between 90 wt% and 452 wt% depending on the ratio of 4-aminopyridine and imidazole and the membranes show good proton conductivity of up to 65 mS cm-1 at 160 °C under non-humidified conditions. The applicability of these materials as a polymer electrolyte membrane was proven by single cell tests at 130 °C. The relationships between PA uptake, chemical composition and mechanical stability are reported. Proton conductivity and mechanical properties only depend on the phosphoric acid content, which, however is a function of the chemical composition.
- High temperature polymer electrolyte membrane fuel cell (HT-PEMFC)
- Udel polysulfone
Hink, S., Elsøe, K., Cleemann, L. N., Henkensmeier, D., Jang, J. H., Kim, H. J., Han, J., Nam, S. W., & Li, Q. (2015). Phosphoric acid doped polysulfone membranes with aminopyridine pendant groups and imidazole cross-links. European Polymer Journal, 72, 102-113. https://doi.org/10.1016/j.eurpolymj.2015.08.026