SEPARATOR FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE SAME
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United States of America Patent
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Issued Date -
Jan 23, 2025
app pub date -
Jan 19, 2024
filing date -
Jan 19, 2024
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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.
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