US 12,266,761 B2
Electrolyte for lithium secondary battery and lithium secondary battery including the same
Hyun Seung Kim, Daejeon (KR); Yu Ha An, Daejeon (KR); Chul Haeng Lee, Daejeon (KR); and Jeong Woo Oh, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/431,890
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Feb. 26, 2020, PCT No. PCT/KR2020/002732
§ 371(c)(1), (2) Date Aug. 18, 2021,
PCT Pub. No. WO2020/175907, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 10-2019-0024104 (KR), filed on Feb. 28, 2019.
Prior Publication US 2022/0140391 A1, May 5, 2022
Int. Cl. H01M 10/05 (2010.01); C07D 233/90 (2006.01); H01M 10/0525 (2010.01); H01M 10/0567 (2010.01); H01M 10/0568 (2010.01); H01M 10/0569 (2010.01)
CPC H01M 10/0567 (2013.01) [C07D 233/90 (2013.01); H01M 10/0525 (2013.01); H01M 10/0568 (2013.01); H01M 10/0569 (2013.01); H01M 2300/0028 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An electrolyte for a lithium secondary battery, the electrolyte comprising:
a lithium salt, wherein the lithium salt comprises LiPF6;
a first additive;
a second additive; and
an organic solvent,
wherein the first additive comprises a compound represented by Formula 1, and
wherein the second additive comprises a compound represented by Formula 2:

OG Complex Work Unit Chemistry
wherein, in Formula 1,
R is a substituted or unsubstituted alkylene group having 1 to 5 carbon atoms, and
A is a substituted or unsubstituted hetero ring connected by the nitrogen (N) in Formula 1 to the remainder of Formula 1, the substituted or unsubstituted hetero ring having 3 to 8 carbon atoms which contains at least one nitrogen atom and at least one double bond,

OG Complex Work Unit Chemistry
wherein, in Formula 2,
R′ is at least one functional group selected from the group consisting of F, CF3, CHF2, CH2F, C2HF4, C2H2F3, C2H3F2, C2F5, C3F7, C3H2F5, C3H4F3, C4F9, C4H2F7, C4H4F5, C5F11, C3F5OCF3, C2F4OCF3, C2H2F2OCF3, and CF2OCF3.