Separator for electrochemical device, and electrode assembly and electrochemical device including the same

Abstract

A separator for an electrochemical device, including a porous substrate, and a porous coating layer on at least one surface of the porous substrate. The porous coating layer includes a binder polymer and an inorganic filler, and satisfies Formula 1 of 20≤[amount of inorganic filler (wt %)×BET surface area of inorganic filler (m2/g)]/[amount of binder polymer (wt %)]≤30, wherein the amount of binder polymer and the amount of inorganic filler are based on 100 wt % of the total weight of the porous coating layer.) The separator ensures the safety of the electrochemical device, while providing improved adhesion between the porous substrate and the porous coating layer of the separator and improved adhesion to an electrode, thereby achieving improved heat resistance and stability.

Dependencies are inferred from the claim text.