Separator including coating layer and battery including the same

摘要

A separator includes a coating layer, the coating layer containing a polyvinylidene fluoride homopolymer, a polyvinylidene fluoride-hexafluoropropylene copolymer, a solvent, and inorganic particles, the solvent being present in an amount of about 100 ppm or less in the coating layer.

主权项

1. A separator, comprising:
a polyolefin base film and a coating layer on one or both sides of the polyolefin base film, the coating layer containing, based on 100 parts by weight of the coating layer in terms of solid content, 5 to 10 parts by weight of a polyvinylidene fluoride homopolymer, 5 to 20 parts by weight of a polyvinylidene fluoride-hexafluoropropylene copolymer, a solvent, and 70 to 90 parts by weight of inorganic particles, the solvent being present in an amount of 100 ppm or less in the coating layer, wherein the polyvinylidene fluoride homopolymer has a weight average molecular weight of 1,000,000 g/mol or more and the polyvinylidene fluoride-hexafluoropropylene copolymer has a weight average molecular weight of 800,000 g/mol or less.