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US 11,380,932 B2Granted
Electrolyte for lithium secondary batteries with improved low temperature performance and lithium secondary battery including the same
AssigneeLG Energy Solution, Ltd.
InventorsEun Hye Kil, Jin Kyu Lee, Ki Tae Kim, Hyung Ku Yun, Hyeaeun Han
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Abstract
Disclosed are an electrolyte for lithium secondary batteries including 10 to 50% by weight of a cyclic carbonate compound, and 50 to 90% by weight of a linear ester compound, based on the total weight of a non-aqueous solvent, wherein a content of ethyl propionate of the linear ester compound is 20 to 60% by weight, based on the total weight of the non-aqueous solvent, and a lithium secondary battery including the electrolyte and exhibiting superior low-temperature characteristics.
Claims16
An electrolyte for lithium secondary batteries, consisting of:
- a non-aqueous solvent, a lithium salt, and an additive that is selected from flame retardants, halogen-containing solvents, carbon dioxide gas, fluoro-ethylene carbonate (FEC), or propene sultone (PRS),
- wherein the non-aqueous solvent consists of 10 to 50% by weight of a cyclic carbonate compound;
- and
- 50 to 90% by weight of a linear ester compound, the linear ester compound is a mixture of ethyl propionate and propyl propionate, and
- the content of ethyl propionate is 20 to 40% by weight, and the content of propyl propionate is 30 to 50% by weight, based on the total weight of the non-aqueous solvent.
2 more elements
Dependencies are inferred from the claim text.