SEPARATOR FOR SECONDARY BATTERY, METHOD FOR MANUFACTURING THE SAME AND SECONDARY BATTERY INCLUDING THE SAME

The present disclosure relates to a separator for a secondary battery, including: a porous polymer substrate; a porous coating layer formed on at least one surface of the porous polymer substrate, and including a plurality of inorganic particles and a first binder polymer for interconnecting and fixing the inorganic particles; and an adhesive layer formed on the top surface of the porous coating layer and including a second binder polymer, wherein the adhesive layer includes a first layer that is in contact with the top surface of the porous coating layer, and a second layer integrated with the first layer and facing an electrode, and the second layer has an average pore size larger than the average pore size of the first layer. [0002] The separator for a secondary battery can improve the problem related with resistance, while ensuring adhesion to an electrode.