| 초록 |
A semi-interpenetrating polymer network (semi-IPN) proton exchange membrane is prepared from the sulfonated poly(ether ether ketone) (sPEEK) and the cerium-organosiloxane based organic/inorganic hybrid network. The cerium-organosiloxane network is synthesized from 3-glycidyloxypropyltrimethoxysiane, 1-hydroxyethane-1,1-diphosphonic acid, and cerium(IV) isopropoxide. The semi-IPN membranes prepared have more flexibilty, higher proton conductivity, and superior oxidation stability than the pristine membrane. The power density of the MEA fabricated with the semi-IPN membrane with 20 wt% cerium-organosiloxane network(cerium/silicon mole ratio =0.10) is 208 mW cm^−2, much better than that of the pristine sPEEK membrane, 165 mW cm^−2. After treating membranes with Fenton’s reagent for 12 h, the power density loss of the semi-IPN membranes with cerium is 4.8 %, while that of others are 33.9 % and 34.1 %. Thus we expect prepared membranes can be good candidate for long-term proton exchange membrane fuel cells (PEMFCs). |
