| abstract |
And a heat resistant porous layer disposed on at least one side of the substrate and including a crosslinking binder, wherein the crosslinking binder is a separator for a lithium secondary battery having a structure crosslinked from an ether compound represented by the following formula (2) and lithium A secondary battery is provided. (2) Wherein X 1 to X 4 , R 1 to R 4 , a 1 to a 4 , n 1 to n 4 and m are each as defined in the specification. |