| 초록 |
An electrolyte membrane operating at high temperature and low humidity is a demand for the proton exchange membrane fuel cells (PEMFCs). Hydrocarbon based polymer electrolytes, however, show large reduction of proton conductivity at low humidity compared to perfluorosulfonated polymers. In order to increase fuel cell performance, dimensional stability, and retain the proton conductivity of the membranes at low humidity condition, sulfonated poly(arylene ether sulfone) (SPAES)-silicate hybrid proton conductors were prepared by using in-situ sol-gel method with functionalized silane, 3-(trihydroxylsilyl)propane-1-sulfonic acid. The effect of functionalized silicate content on dimensional stability and water uptake of the hybrid membranes was quantitatively identified. And the ion exchange capacity (I.E.C.) and transport properties were discussed to provide an in-depth understanding of the performance and proton conductivity enhancement. |
