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Polyimide non-woven lithium-ion battery separator has a great development prospect for its excellent high temperature resistance and electrolyte wettability,which can ensure high temperature safety performance of the battery when its high rate charge and discharge capability is remained.This work studied the preparation of polyimide li-ion battery separator by an electrospinning method.The results show that polyimide separator is much superior to traditional polyolefin separators in both high temperature resistant performance and electrolyte wettability.