| 초록 |
Lithium conductive solid state poly(arylene ether sulfone)-g-poly(ethylene glycol) (PAES-g-PEG) electrolyte was synthesized for the application of both solid state electrolyte membrane and electrode conductive binder. The solid polymer electrolyte prepared from PAES-g-PEG and 1-butyl-1-methylpyrrollidum bis(fluoromethane sulfonyl) ionic liquid illustrated high lithium conductivity. As the PAES-g-PEG with LiTFSI salt exhibited not only such high conductivity but also, it played an important role as a binder for the electrode binder. As the active materials such as LiCoO2, LiNi0.6Mn0.2Co0.2O2 were quite well compatible with PAES-g-PEG binder, the battery cells fabricated via binding the synthesized SPE and cathode layer showed excellent cell performance. This multi-functional PAES-g-PEG material was applied to lithium sulfur battery system, the resulting cell discharge capacity was even higher than 925 mAh g-1 at 0.1C with long term cyclic stability (> 50 cycles). |
