US 12,074,271 B2
Lithium secondary battery including electrolyte additive for lithium secondary battery
Taehyon Bae, Yongin-si (KR); and Aehui Goh, Yongin-si (KR)
Assigned to SAMSUNG SDI CO., LTD., Yongin-si (KR)
Appl. No. 17/439,089
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
PCT Filed Feb. 13, 2020, PCT No. PCT/KR2020/002063
§ 371(c)(1), (2) Date Sep. 14, 2021,
PCT Pub. No. WO2020/197093, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 10-2019-0036213 (KR), filed on Mar. 28, 2019.
Prior Publication US 2022/0158224 A1, May 19, 2022
Int. Cl. H01M 10/0525 (2010.01); H01M 10/0567 (2010.01); H01M 10/0568 (2010.01); H01M 10/0569 (2010.01)
CPC H01M 10/0525 (2013.01) [H01M 10/0567 (2013.01); H01M 10/0568 (2013.01); H01M 10/0569 (2013.01); H01M 2300/0028 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A lithium secondary battery comprising: a cathode; an anode; and an electrolyte interposed between the cathode and the anode, wherein
the electrolyte includes at least one compound (A) represented by Formula 1 below and at least one compound (B) represented by Formula 2 below, and the lithium secondary battery has an operating voltage of 4.45 V or more:

OG Complex Work Unit Chemistry
wherein, in Formulae 1 and 2,
R1 and R11 to R13 are each independently selected from a substituted or unsubstituted C1-C30 alkyl group, a substituted or unsubstituted C2-C30 alkenyl group, and a substituted or unsubstituted C2-C30 alkynyl group,
Z1 is selected from hydrogen, a halogen, a cyano group, a C1-C10 alkoxy group, a hydroxyl group, a nitro group, a substituted or unsubstituted C1-C30 alkyl group, a substituted or unsubstituted C2-C30 alkenyl group, and a substituted or unsubstituted C2-C30 alkynyl group, and
a substituent of each of the substituted C1-C30 alkyl group, substituted C2-C30 alkenyl group, and substituted C2-C30 alkynyl group is at least one selected from a C1-C10 alkyl group, a C2-C10 alkenyl group, a C1-C10 alkoxy group, a halogen, a cyano group, a hydroxyl group, and a nitro group.