	US 12,278,335 B2
	Polymer electrolyte for secondary battery and lithium secondary battery including the same
Sol Ji Park, Daejeon (KR); Kyoung Ho Ahn, Daejeon (KR); Chul Haeng Lee, Daejeon (KR); and Jun Hyeok Han, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 16/610,592
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Jul. 26, 2018, PCT No. PCT/KR2018/008450 § 371(c)(1), (2) Date Nov. 4, 2019, PCT Pub. No. WO2019/022522, PCT Pub. Date Jan. 31, 2019.
Claims priority of application No. 10-2017-0094959 (KR), filed on Jul. 26, 2017; and application No. 10-2018-0086713 (KR), filed on Jul. 25, 2018.
Prior Publication US 2020/0203762 A1, Jun. 25, 2020
Int. Cl. H01M 10/0565 (2010.01); C08J 5/18 (2006.01); C08L 69/00 (2006.01); H01M 10/0525 (2010.01); H01M 50/491 (2021.01); H01M 50/494 (2021.01); H01M 50/497 (2021.01)

CPC H01M 10/0565 (2013.01) [C08J 5/18 (2013.01); C08L 69/00 (2013.01); H01M 10/0525 (2013.01); H01M 50/491 (2021.01); H01M 50/494 (2021.01); H01M 50/497 (2021.01); C08J 2369/00 (2013.01); H01M 2300/0065 (2013.01); H01M 2300/0082 (2013.01); H01M 2300/0091 (2013.01)]

13 Claims

1. A polymer electrolyte for a secondary battery, the polymer electrolyte comprising:

a first polymer matrix of a first polymer, wherein the first polymer comprises at least one repeating unit represented by Formulae 1a or 1c; and

a second polymer matrix of a second polymer, wherein the second polymer comprises a repeating unit derived from a monomer having at least one ethylenically unsaturated group or an oligomer thereof,

wherein the second polymer has a crosslinking structure obtained by cross-linking polymerization of the monomer having the at least one ethylenically unsaturated group or oligomer thereof,

wherein the second polymer matrix is in the form of a polymer network structure,

wherein the second polymer matrix is disposed in free volumes of the first polymer matrix, and

wherein the second polymer is poly(vinyl acetate),

wherein, in Formula 1a, n₁is an integer of 10 to 10,000, and

wherein, in Formula 1c, n₃is an integer of 10 to 10,000.

6. A lithium secondary battery comprising:

a positive electrode;

a negative electrode; and

a polymer electrolyte film formed on at least one surface of the positive electrode or the negative electrode,

wherein the polymer electrolyte film comprises the polymer electrolyte of claim 1.