SEPARATOR FOR LITHIUM-SULFUR BATTERY AND LITHIUM-SULFUR BATTERY COMPRISING THE SAME

The present invention relates to a separator for a lithium-sulfur battery, comprising: a first layer having a porosity of 50 vol% or more, wherein the first layer is on a first surface of the separator, wherein a thickness of the first layer is 50% or more of 100% of a thickness of the; and a lithium-sulfur battery, comprising: an electrode assembly and an electrolyte, wherein the electrode assembly comprises a positive electrode, a negative electrode and a separator between the negative electrode and the positive electrode, wherein the positive electrode comprises a positive electrode active material layer, and the positive electrode active material layer comprises a sulfur and/or a sulfur compound, wherein the separator is as defined in the application, andwherein the first layer of the separator is in contact with the positive electrode active material layer.