US 12,218,306 B2
Electrolyte for lithium secondary battery and lithium secondary battery including the same
Sung Yon Oh, Daejeon (KR); Dong Gun Lee, Daejeon (KR); Jin Haek Yang, Daejeon (KR); and In Haeng Cho, Daejeon (KR)
Assigned to SK On Co., Ltd., Seoul (KR)
Filed by SK On Co., Ltd., Seoul (KR)
Filed on Dec. 4, 2019, as Appl. No. 16/703,161.
Claims priority of application No. 10-2018-0158334 (KR), filed on Dec. 10, 2018.
Prior Publication US 2020/0185773 A1, Jun. 11, 2020
Int. Cl. H01M 10/0525 (2010.01); H01M 10/0567 (2010.01); H01M 10/0568 (2010.01); H01M 10/0569 (2010.01)
CPC H01M 10/0567 (2013.01) [H01M 10/0525 (2013.01); H01M 10/0568 (2013.01); H01M 10/0569 (2013.01)] 15 Claims
 
1. An electrolyte for a secondary battery, the electrolyte comprising:
a lithium salt;
a nonaqueous organic solvent; and
a cyclic fluorophosphonate compound represented by the following Chemical Formula 1:

OG Complex Work Unit Chemistry
wherein
R1 and R2 are independently of each other hydrogen, C1-C10alkyl, halogen, C1-C10alkoxy, C3-C10cycloalkyl, or C6-C20aryl, and the alkyl, alkoxy, cycloalkyl, or aryl may be further substituted by one or more selected from the group consisting of C1-C10alkyl, halogen, haloC1-C10alkyl, C1-C10alkoxy, C1-C10alkoxyC1-C10alkyl, C3-C10cycloalkyl, and C6-C20aryl;
A is —(CRaRb)m—, C3-C10cycloalkylene, or C6-C20arylene, and the cycloalkylene or arylene may be further substituted by one or more selected from the group consisting of C1-C10alkyl, halogen, haloC1-C10alkyl, C1-C10alkoxy, C1-C10alkoxyC1-C10alkyl, C3-C10cycloalkyl, and C6-C20aryl;
Ra and Rb are independently of each other hydrogen, C1-C10alkyl, halogen, C1-C10alkoxy, C3-C10cycloalkyl, or C6-C20aryl, and the alkyl, alkoxy, cycloalkyl, or aryl may be further substituted by one or more selected from the group consisting of C1-C10alkyl, halogen, haloC1-C10alkyl, C1-C10alkoxy, C1-C10alkoxyC1-C10alkyl, C3-C10cycloalkyl, and C6-C20aryl; and
m is an integer of 1 to 5.