Heat resistant microporous membranes based on soluble poly(aryl ether ketone) copolymers for lithium ion battery separator

To improve the safety and electrochemical properties of lithium ion batterie (LIB), a series of novel organic soluble poly(aryl ether ketone) (PAEK) copolymers were synthesized and used to fabricate LIB separators. The PAEK copolymers exhibited superior structural thermal stability and flame retardant, with glass transition temperature ( T g ) above 150°C, oxygen index above 30 and no thermal decomposition before 500°C. Accordingly, the...