| 초록 |
Ion conductive poly(arylene ether ketone) (PAEK) and poly(arylene ether sulfone) (PAES) membranes were prepared in a variety of structures including cross-linked and graft and multi-block copolymers to enhance dimensional and mechanical stability as well as ion conductivity for application of secondary battery and fuel cell systems. In lithium secondary battery application, those were prepared in solid forms to be applied as a robust solid state electrolyte. In fuel cell application, proton conducting PAEK was modified with hygroscopic mesoporous conductors to lessen their dehydration in the low humid environment. The antioxidant toughening agent of cerium/organosiloxane polymer network (Ce/OSPN), was introduced to adjust the elongation and chemical stability of the membranes. Several essential properties of a series of of arylene based polymer electrolyte membranes and their precursors such as ion conductivity, fuel crossover, thermal and mechanical stability, and electrochemical performance were analyzed. Those properties were correlated with the phase separation behavior investigated employing SEM, TEM, and SAXS. |
