CPC H01M 50/446 (2021.01) [H01M 4/622 (2013.01); H01M 10/0525 (2013.01); H01M 10/0565 (2013.01)] | 10 Claims |
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.
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