US 11,967,679 B2
Composition for gel polymer electrolyte and lithium secondary battery including gel polymer electrolyte formed therefrom
Kyoung Ho Ahn, Daejeon (KR); Jung Hoon Lee, Daejeon (KR); Won Kyung Shin, Daejeon (KR); Jae Won Lee, Daejeon (KR); Min Jung Kim, Daejeon (KR); and Chul Haeng Lee, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/291,263
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Nov. 6, 2019, PCT No. PCT/KR2019/014965
§ 371(c)(1), (2) Date May 4, 2021,
PCT Pub. No. WO2020/096343, PCT Pub. Date May 14, 2020.
Claims priority of application No. 10-2018-0134836 (KR), filed on Nov. 6, 2018.
Prior Publication US 2022/0085410 A1, Mar. 17, 2022
Int. Cl. H01M 10/0565 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 10/0565 (2013.01) [H01M 10/0525 (2013.01); H01M 2300/0082 (2013.01); H01M 2300/0085 (2013.01)] 11 Claims
 
1. A composition for a gel polymer electrolyte, the composition comprising a lithium salt, a non-aqueous organic solvent, a polymerization initiator, and an oligomer,
wherein the oligomer comprises at least one selected from the group consisting of oligomers represented by Formula 1 and Formula 2:

OG Complex Work Unit Chemistry
wherein, in Formula 1,
R′ and R″ are each independently an aliphatic hydrocarbon group or an aromatic hydrocarbon group,
R1 is a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkylene group having 4 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heterocycloalkylene group having 2 to 20 carbon atoms, —CO—O—R—, where R is an alkylene group having 1 to 10 carbon atoms, —Ro—CO—, where Ro is an alkylene group having 1 to 10 carbon atoms, or —Ri—O—R′i—, where Ri and R′i are each independently a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms,
R2 is —CO—O—R3—O—, where R3 is a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkylene group having 4 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heterocycloalkylene group having 2 to 20 carbon atoms, —CO—O—R—, where R is an alkylene group having 1 to 10 carbon atoms, —Rj—CO—, where Rj is an alkylene group having 1 to 10 carbon atoms, or —Rk—O—R′k—, where Rk and R′k are each independently a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, or —R4—CO—O—, where R4 is a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkylene group having 4 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, or a substituted or unsubstituted heterocycloalkylene group having 2 to 20 carbon atoms),
Ra, Rb, Rc, and Rd are each independently hydrogen or an alkyl group having 1 to 3 carbon atoms,
n is an integer of 1 to 100, and
m is an integer of 1 to 100,
a and c are each independently an integer of 0 to 2, and
b and d are each independently an integer of 1 to 3:

OG Complex Work Unit Chemistry
wherein, in Formula 2,
R5, R6, R7, and R8 are each independently a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkylene group having 4 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heterocycloalkylene group having 2 to 20 carbon atoms, —CO—O—Rm—, where Rm is an alkylene group having 1 to 10 carbon atoms, —Rn—CO—, where Rn is an alkylene group having 1 to 10 carbon atoms, or —R12—O—R13—, where R12 and R13 are each independently a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms,
R9, R10, and R11 are each independently an aliphatic hydrocarbon group or an aromatic hydrocarbon group,
Re, Rf, Rg, and Rh are each independently hydrogen or an alkyl group having 1 to 3 carbon atoms,
o is an integer of 1 to 100,
p is an integer of 1 to 100, and
q is an integer of 1 to 100,
a1 and c1 are each independently an integer of 0 to 2, and
b1 and d1 are each independently an integer of 1 to 3.