Patent ID: 11967732
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A separation membrane for a lithium secondary battery, the separation membrane comprising:
a substrate;
a first coating layer containing a first organic binder which is able to be bonded to a gel polymer electrolyte through an epoxy ring-opening reaction; and
a second coating layer containing a second organic binder,
wherein the first organic binder is substituted with epoxy group, a functional group capable of ring-opening reaction with an epoxy group, or a combination thereof, and
the gel polymer electrolyte is formed by polymerizing an oligomer having an epoxy group, a functional group capable of ring-opening reaction with an epoxy group, or a combination thereof.