US 11,658,342 B2
Non-aqueous electrolyte solution and lithium secondary battery including the same
Won Kyung Shin, Daejeon (KR); Kyoung Ho Ahn, Daejeon (KR); Chul Haeng Lee, Daejeon (KR); and Jeong Woo Oh, Daejeon (KR)
Assigned to LG Energy Solution, Ltd.
Appl. No. 16/770,833
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Mar. 6, 2019, PCT No. PCT/KR2019/002605
§ 371(c)(1), (2) Date Jun. 8, 2020,
PCT Pub. No. WO2019/172650, PCT Pub. Date Sep. 12, 2019.
Claims priority of application No. 10-2018-0026545 (KR), filed on Mar. 6, 2018.
Prior Publication US 2021/0151799 A1, May 20, 2021
Int. Cl. H01M 10/0568 (2010.01); H01M 10/0525 (2010.01); H01M 10/0567 (2010.01)
CPC H01M 10/0568 (2013.01) [H01M 10/0525 (2013.01); H01M 10/0567 (2013.01)] 11 Claims
1. A non-aqueous electrolyte solution for a lithium secondary battery, the electrolyte solution comprising:
an ionic solution including at least one anion selected from the group consisting of a bis(fluorosulfonyl)imide anion and a bis(trifluoromethane)sulfonylimide anion, a cation, and a non-aqueous solvent;
a lithium salt;
a phosphite-based additive; and
a surfactant including an oligomer represented by Formula 1 below,

OG Complex Work Unit Chemistry
wherein, in Formula 1,
R0 and R0′ are each independently a substituted or unsubstituted alkylene group having 1 to 5 carbon atoms,
R and R′ are each independently an aliphatic, alicyclic or aromatic hydrocarbon group,
R″ and R′″ are each independently hydrogen or an alkyl group having 1 to 3 carbon atoms,
a is an integer of 1 to 3,
b is an integer of 0 to 2,
m1 and m3 are each independently an integer selected from among 1 to 15,
m2 is an integer selected from among 1 to 10, and
x is an integer selected from among 1 to 15.