CPC H01M 50/446 (2021.01) [C08F 120/12 (2013.01); C09D 101/02 (2013.01); C09D 127/16 (2013.01); C09D 171/02 (2013.01); C09D 179/08 (2013.01); H01M 10/0525 (2013.01); H01M 10/0565 (2013.01); H01M 50/42 (2021.01); H01M 50/449 (2021.01); H01M 50/451 (2021.01); H01M 50/417 (2021.01); H01M 50/426 (2021.01); H01M 50/454 (2021.01); H01M 2300/0082 (2013.01); H01M 2300/0085 (2013.01)] | 13 Claims |
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.
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