| abstract |
The present invention includes a porous separator substrate made of a polyolefin-based material and a coating layer coated on at least one surface of the separator substrate, wherein the coating layer is a dry form of a slurry containing a binder, an inorganic material, a mixed solvent containing two or more solvents, and a dispersant And, the inorganic material is a metal hydroxide, and the dispersant is a separator for a secondary battery, which is a polyphenol compound containing 10 to 30 hydroxy groups, which forms a uniform coating layer and has improved adhesion. |