Patent ID: 11929519
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 0:
1. A lithium secondary battery comprising:
a positive electrode;
a negative electrode;
a separator; and
a gel polymer electrolyte disposed between the positive electrode and the negative electrode and the separator, comprising a polymer of an oligomer containing a (meth)acrylate group,
wherein the separator, comprises:
a substrate; and
a coating layer formed on a surface of the substrate,
wherein
the coating layer includes an organic binder and inorganic particles,
the organic binder comprises an ethylenically unsaturated group positioned at an end portion or a side portion of a polymer including at least one unit selected from the group consisting of Formula X-1 and Formula X-2, and
the separator comprises a polymer network in a three-dimensional structure of a polymer of the organic binder containing the ethylenically unsaturated group and the oligomer containing a (meth)acrylate group:, wherein, in Formula X-1, m1 is an integer of 1 to 100,, wherein, in Formula X-2, m2 and m3 are each independently an integer of 1 to 100.