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변승우,이승현,송단오,유명현,이용민,박원호 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.72 No.-
Thermostable polymers offer excellent thermal and mechanical stabilities, and in this study, anorganosoluble polyimide (PI) was employed to fabricate high-performance separators for use inadvanced lithium-ion batteries (LIBs). The organosoluble PI was synthesized and its nanofibrousmembrane was fabricated via electrospinning. A subsequent heat treatment induced thermalcrosslinking between the PI nanofibers to improve the heat resistance of the separators. PI nanofibrousmembrane exhibited excellent wettability toward the liquid electrolyte, resulting in a greatly improvedrate capability and cycle life. These results suggest that organosoluble PI nanofibrous membranes have ahigh potential for use as separators in high-performance LIBs.