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|1. (WO2013157867) LITHIUM SECONDARY BATTERY HAVING IMPROVED RATE CHARACTERISTICS|
|Applicants:||LG CHEM, LTD.
|Inventors:||JEON, Jong Ho
KIM, Yoo Seok
YANG, Doo Kyung
|Title:||LITHIUM SECONDARY BATTERY HAVING IMPROVED RATE CHARACTERISTICS|
The present invention relates to a lithium secondary battery having improved rate characteristics, and more particularly, to a lithium secondary battery having a positive electrode, a negative electrode, and a separation membrane and an electrolyte interposed between the positive electrode and the negative electrode, wherein the electrolyte contains a mixed solvent of a ring-shaped carbonate material and a propionate material, the positive electrode contains lithium-manganese composite oxide expressed by the following chemical formula 1 as an active material, and the negative electrode contains lithium metal oxide expressed by the following chemical formula 2 as an active material. LixMyMn2-yO4-zAz (1) (In the formula, 0.9≤x≤1.2, 0