Separator for rechargeable lithium battery and rechargeable lithium battery including the same

Abstract

A separator for a rechargeable lithium battery, the separator includes a substrate; a heat resistant layer on the substrate; and an adhesive layer on the heat resistant layer, wherein the heat resistant layer includes inorganic particles, and a salt-based heat resistant binder, the adhesive layer includes a first adhesive binder including PVdF-acrylate; a PVdF homopolymer second adhesive binder; and a P(VdF-co-HFP) copolymer third adhesive binder, the third adhesive binder has a weight ratio of VdF and HFP of about 95:5 to about 50:50 and includes a C═O functional group of a (meth)acrylic acid monomer, and the adhesive layer includes about 10 to about 40 wt % of the first adhesive binder; about 30 to about 80 wt % of the second adhesive binder; and about 10 to about 40 wt % of the third adhesive binder, all wt % being based on a total weight of the adhesive layer.

Dependencies are inferred from the claim text.