US 11,817,557 B2
Electrolyte for lithium secondary battery
Won Kyung Shin, Daejeon (KR); Kyoung Ho Ahn, Daejeon (KR); Chul Haeng Lee, Daejeon (KR); Min Jung Kim, Daejeon (KR); and Jae Won Lee, Daejeon (KR)
Assigned to LG Energy Solution, Ltd.
Appl. No. 16/979,007
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Jul. 26, 2019, PCT No. PCT/KR2019/009356
§ 371(c)(1), (2) Date Sep. 8, 2020,
PCT Pub. No. WO2020/036336, PCT Pub. Date Feb. 20, 2020.
Claims priority of application No. 10-2018-0095549 (KR), filed on Aug. 16, 2018.
Prior Publication US 2021/0202993 A1, Jul. 1, 2021
Int. Cl. H01M 10/0567 (2010.01); H01M 10/0525 (2010.01); H01M 10/0565 (2010.01); H01M 10/0568 (2010.01); C08F 283/04 (2006.01)
CPC H01M 10/0567 (2013.01) [C08F 283/045 (2013.01); H01M 10/0525 (2013.01); H01M 10/0565 (2013.01); H01M 10/0568 (2013.01); H01M 2300/0025 (2013.01); H01M 2300/0082 (2013.01); H01M 2300/0085 (2013.01)] 15 Claims
 
1. An electrolyte for a lithium secondary battery, comprising:
a lithium salt having a concentration of 1.6 M to 5 M;
an oligomer mixture which includes a first oligomer containing a unit represented by Formula 1 and a second oligomer containing a unit represented by Formula 2; and
an organic solvent:

OG Complex Work Unit Chemistry
wherein, in Formula 1,
Ra, Rb, Rc, and Rd are each independently fluorine or an alkyl group having 1 to 3 carbon atoms which is unsubstituted or substituted with fluorine, and
p is an integer of 1 to 50,

OG Complex Work Unit Chemistry
wherein, in Formula 2, Rg, Rh, Ri, and Rj are each independently hydrogen, or a substituted or unsubstituted alkyl group having 1 to 5 carbon atoms, and
s is an integer of 1 to 50.