US 11,894,520 B2
Non-aqueous electrolyte including additive for non-aqueous electrolyte, and lithium secondary battery including the non-aqueous electrolyte
Yoon Gyo Cho, Daejeon (KR); Jeong Woo Oh, Daejeon (KR); and Chul Haeng Lee, Daejeon (KR)
Assigned to LG Energy Solution, Ltd.
Filed by LG Energy Solution, Ltd., Seoul (KR)
Filed on Jan. 12, 2023, as Appl. No. 18/153,608.
Claims priority of application No. 10-2022-0005271 (KR), filed on Jan. 13, 2022.
Prior Publication US 2023/0223598 A1, Jul. 13, 2023
Int. Cl. H01M 10/0567 (2010.01); H01M 10/0569 (2010.01); H01M 10/0568 (2010.01)
CPC H01M 10/0567 (2013.01) [H01M 10/0568 (2013.01); H01M 10/0569 (2013.01); H01M 2300/0034 (2013.01)] 15 Claims
 
1. A non-aqueous electrolyte comprising:
a lithium salt;
an organic solvent;
a first additive; and
a second additive,
wherein the first additive is a compound represented by Formula 1; and
the second additive is a polymer comprising a repeating unit represented by Formula 2-1, Formula 2-2, and Formula 2-3:

OG Complex Work Unit Chemistry
wherein, in Formula 1,
R is a substituted or unsubstituted alkylene group having 1 to 3 carbon atoms, and
R1 to R3 are each independently H, an alkyl group having 1 to 3 carbon atoms, or a nitrile group,

OG Complex Work Unit Chemistry
wherein, in Formula 2-1 above,
R4 is any one selected from the group consisting of H, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, a cycloalkenyl group having 3 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, a halogen atom, and a nitrile group,

OG Complex Work Unit Chemistry
wherein, in Formula 2-2 above,
R4 is an alkyl group having 1 to 10 carbon atoms which is substituted with at least one nitrile group, and
R5 is any one selected from the group consisting of H, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, a cycloalkenyl group having 3 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, a halogen atom, and a nitrile group, and

OG Complex Work Unit Chemistry
wherein, in Formula 2-3 above,
Rb is an fluoroalkyl group having 1 to 10 carbon atoms, and
R6 is any one selected from the group consisting of H, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, a cycloalkenyl group having 3 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, a halogen atom, and a nitrile group.