| 摘要 |
Disclosed is a lithium secondary battery comprising: (a) a cathode; (b) an anode; (c) a separator; and (d) a non-aqueous electrolyte comprising a lithium salt and an organic solvent, wherein the cathode comprises a cathode active material, doped with at least one element selected from the group consisting of Sn, Al and Zr, or containing the element in the form of a solid solution, and the non-aqueous electrolyte comprises a lithium-containing inorganic salt and a lithium imide salt dissociated in at least one organic solvent including ?-butyrolactone (GBL). The lithium secondary battery can minimize side reactions between both electrodes and ?-butyrolactone (GBL), used as a conventional electrolyte for a battery, and thus can provide high capacity, long service life and improved quality at high-temperature. |
