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US 12,770,923 B2Granted
Electrolyte solution for lithium secondary battery and lithium secondary battery including the same
AssigneeSK On Co., Ltd.
InventorsIn Haeng Cho, Yu Na Shim, Moon Sung Kim, Sung Jin Kim, Soo Min Park, Min Young Lee, Jin Hong Lee
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Abstract
An electrolyte solution for a lithium secondary battery includes an organic solvent, a lithium salt, and a fluorine-based additive in which a terminal difluoro-phosphite group (—OPF2) is bonded to a branched saturated hydrocarbon group. The fluorine-based additive prevent side reactions in the electrolyte solution to improve stability of a cathode active material.
Claims9
An electrolyte solution for a lithium secondary battery, comprising:
- an organic solvent;
- a lithium salt;
- and
- a fluorine-based additive in which a terminal difluoro-phosphite group (—OPF2) is bonded to a branched saturated hydrocarbon group,
- wherein the fluorine-based additive comprises a compound represented by Chemical Formula 2 below:
- wherein, in Chemical Formula 2, R3 and R4 are each independently a C1-C10 alkyl group.
3 more elements
Dependencies are inferred from the claim text.