SEPARATOR WITH A POROUS COATING LAYER AND ELECTROCHEMICAL DEVICE HAVING THE SAME

摘要

The present invention relates to a separator including: a monolayer-type polyolefin-based microporous film having a porosity of 40 to 60%, a mean pore diameter of 60 nm or smaller, and an air permeability of 350s/100mL or lower; and a porous coating layer formed on at least one side of the microporous film, and composed of a mixture of inorganic particles and binder polymers. An electromechanical device having the separator of the present invention has an excellent thermal stability, and generates a high output while minimizing leakage current.