| abstract |
The present invention (a) a porous substrate having pores; And (b) a coating layer formed on at least one region selected from the group consisting of a surface of the substrate and a part of pores present in the substrate, wherein the coating layer is a styrene-butadiene (SBR) -based Provided is a porous film comprising a rubber and an electrochemical device using the porous film as a separator.n n n The porous film according to the present invention may be coated with a styrene-butadiene-based polymer with adjustable rubber properties to enhance scratch resistance of the final film and adhesion to other substrates, thereby providing improved safety and prevention of performance degradation of the electrochemical device. have.n n n n Porous substrates, styrene, butadiene, rubber, scratch resistance, electrochemical devices |