Patent ID: 11870036
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A non-aqueous electrolyte solution for a lithium secondary battery, the non-aqueous electrolyte solution comprising:
an organic solvent,
a first lithium salt that is LiPF6,
a second lithium salt excluding LiPF6,
a first additive that is an oligomer represented by Formula 1, and
a second additive that is a mixed additive of lithium difluorophosphate (LiDFP), fluorobenzene (FB), and tetravinylsilane (TVS),
wherein the second additive comprises the lithium difluorophosphate (LiDFP), the fluorobenzene (FB), and the tetravinylsilane (TVS) in a weight ratio of 1:1:0.05 to 1:6:0.5:, wherein, in Formula 1,
R1 is —R1′—O—, wherein R1′ is an alkylene group having 1 to 5 carbon atoms which is unsubstituted or substituted with fluorine,
R2 is —R2′—O—, wherein R2′ is an alkylene group having 1 to 3 carbon atoms which is unsubstituted or substituted with fluorine,
R3 is an alkylene group having 1 to 5 carbon atoms which is unsubstituted or substituted with fluorine,
R4 is an aliphatic hydrocarbon group or an aromatic hydrocarbon group,
Ra and Rb are each independently hydrogen or an alkyl group having 1 to 3 carbon atoms,
o, p, q, and r are numbers of repeating units,
is an integer of 1 to 5,
p is an integer of 1 to 10,
r is an integer of 1 to 5,
q is an integer of 3 to 15, and
b and c are each independently an integer of 1 to 3.