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|1. (WO2018040911) BATTERY SEPARATOR AND LITHIUM ION BATTERY AND PREPARATION METHOD OF SAME|
|Applicants:||BYD COMPANY LIMITED
|Title:||BATTERY SEPARATOR AND LITHIUM ION BATTERY AND PREPARATION METHOD OF SAME|
The present disclosure relates to the field of lithium ion batteries, and wherein a battery separator and a lithium ion battery and a preparation method of the same are disclosed. The battery separator comprises a porous base membrane and an adhesive layer attached on at least one side surface of the porous base membrane, the adhesive layer containing an acrylate crosslinked polymer and a styrene-acrylate crosslinked copolymer and/or a vinylidene fluoride-hexafluoropropylene copolymer, and having a porosity of 40-65%.