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Roshni Lilly Thankamony,이명건,김규원,홍종달,김태현,이혜진,김형준,남석우,임용범 한국고분자학회 2010 Macromolecular Research Vol.18 No.10
Sulfonated poly(fluorenyl ether sulfone) (PFES) with a terminally-crosslinked network structure was prepared by heat-induced crosslinking of the allyl-terminated telechelic sulfone polymers using a bisazide. The crosslinked polymer membrane with a sulfofluorenyl moiety of 70% (PFES-70) showed excellent hydrolytic,dimensional, and mechanical stability. The crosslinked PFES-70 membrane revealed a proton conductivity of 0.04S/cm at 20 oC, which increased significantly with increasing temperature. The conductivity of 0.38 S/cm at 100 oC for PFES-70 was higher than that of both non-crosslinked (0.33 S/cm) and Nafion® (0.17 S/cm). In addition, the crosslinked PFES-70 showed a methanol permeability of only 1.4% (3.9×10-8 cm2 /s) compared to Nafion®.
Roshni Lilly Thankamony,김태현,추호동,임상현,임태은,김영준 한국고분자학회 2015 Macromolecular Research Vol.23 No.1
The synthesis and properties of a solvent-free gel polymer electrolyte based on an imidazolium-poly(ethyleneoxide) (PEO)-based ionene electrolyte, a poly(vinylidene fluoride-hexafluoropropylene) (PVDF(HFP)) support, andthe lithium bis(trifluoromethane sulfonyl) imide (LiTFSI) salt are reported. A ternary gel polymer electrolyte film,produced from mixtures of the imidazolium-PEO-based ionene ([IPI][Br]), PVDF(HFP), and LiTFSI, displayedgood thermal and mechanical stability. A very high room temperature conductivity of 2.6×10-3 S/cm and a broadelectrochemical stability window were obtained, demonstrating the utility of the electrolyte for practical Li-ion battery applications.