FUNCTIONAL SEPARATOR HAVING CATALYTIC SITES INTRODUCED THEREINTO, MANUFACTURING METHOD THEREFOR, AND LITHIUM SECONDARY BATTERY COMPRISING SAME

In order to solve the problems caused by lithium polysulfide leaching from the positive electrode, disclosed is a catalytic site-introduced functional separator, a method of manufacturing the same, and a lithium secondary battery including the same, which can improve the capacity and lifetime of the battery by coating a material, which can act as a reduction catalyst for lithium polysulfide, on the surface of the separator. The catalytic site-introduced functional separator includes a base separator and a catalytic site-containing coating layer located on the surface of the base separator.