SEPARATOR FOR ELECTROCHEMICAL DEVICE, ELECTROCHEMICAL DEVICE INCLUDING THE SAME AND METHOD OF MANUFACTURING THE SAME

A separator for an electrochemical device of the present disclosure includes: a porous polymer substrate; and a coating layer that is provided on at least one surface of the porous polymer substrate, and includes a polymer binder and inorganic particles. The coating layer includes a first coating layer and a second coating layer formed on the first coating layer, and the packing density of the coating layer is about 1.70 g/cmor less.