METHOD FOR MANUFACTURING A SEPARATOR, SEPARATOR MADE BY SAME, AND ELECTROCHEMICAL DEVICE COMPRISING THE SEPARATOR

摘要

According to the present invention, a method for manufacturing a separator comprises the following steps: (S1) performing a corona discharge treatment on at least one bonding surface of two porous substrates and laminating the porous substrates; (S2) coating both sides of the lamination of the porous substrates with slurry comprising inorganic particles that are dispersed therein and a polymer binder that is dissolved in a solvent; and (S3) delaminating the coated lamination of the porous substrates. The method of the present invention can manufacture two separators at the same time to improve productivity, and performs a corona discharge treatment to reduce damage to the surfaces of the porous substrates, which might otherwise occur during lamination, and to maintain the porosity of the porous substrates, and therefore the excellent performance of an electrochemical device using the separator of the present invention can be ensured.