Separator for lithium secondary battery, method of producing the same, and electrochemical device including the same

A method of producing a separator for a lithium secondary battery, the method comprising:

• (s1) preparing a slurry composition comprising a binder and inorganic particles;
• and
• (s2) applying the slurry composition on one surface or both surfaces of a porous substrate to form a coating layer,
• wherein the binder is a binder comprising:
• (a) 66 to 93 mol % of a (meth)acrylamide-based monomer polymerization unit, (b) 6 to 31 mol % of a (meth)acryl-based monomer polymerization unit containing a hydroxyl group, and (c) 0.005 to 0.041 mol % of a polyfunctional (meth)acrylamide-based monomer polymerization unit,
• wherein (b) the (meth)acryl-based monomer polymerization unit containing a hydroxyl group is represented by the following Chemical Formula 2:
• wherein
• R2 is hydrogen or a C1 to C6 alkyl group, and
• L1 is a linear or branched C1 to C6 alkylene group.