| 초록 |
Surface modification of sulfonated poly(arylene ether sulfone)-silica nanocomposite (FSPAES-SiO2) membrane was investigated by using direct fluorination. Surface fluorination treatments convert 20% C-H into C-F bonds on membrane surface. These membranes exhibited high proton conductivity, high dimensional stability and low methanol permeability. Furthermore, this surface enrichment of fluorine atoms led to low interfacial resistance between membrane and catalyst layer with Nafion® ionomer. Thus, FSPAES-SiO2 membranes improved single cell performance (~200%) significantly at constant voltage of 0.4V comparing to pristine membrane and showed long-term durability over 1400 hr. |
