FUNCTIONAL SEPARATOR, MANUFACTURING METHOD THEREFOR, AND LITHIUM SECONDARY BATTERY COMPRISING SAME

Disclosed is a functional separator capable of improving the capacity and lifetime of a battery by coating a material capable of reducing lithium polysulfide on the surface of the separator, a method for manufacturing the same, and a lithium secondary battery comprising the same. The functional separator comprises a base separator and a polyethylene oxide (PEO)-conductive carbon composite layer located on the surface of the base separator.