SEPARATOR FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY INCLUDING THE SAME

A separator for a lithium secondary battery and a lithium secondary battery including the separator, where the separator includes a porous polymer substrate; and a porous coating layer on at least one surface of the porous polymer substrate. The porous coating layer includes inorganic particles having a Mohs hardness of 3.5 to 8.5 and a binder polymer. The binder polymer includes a first binder polymer having a storage modulus at 70° C. of 500 Mpa or more. The separator shows excellent compression resistance.