| 摘要 |
Disclosed is a non-aqueous electrolyte and a lithium rechargeable battery including the same, a first lithium salt represented by the following Chemical Formula 1, and a second lithium salt excluding boron. In the above Chemical Formula 1, Ra to Rd are substituted or unsubstituted alkyl, substituted or unsubstituted alkylene, substituted or unsubstituted alkylene oxide, or a halogen, or one or more non-adjacent —CH2— in the alkyl, alkylene, and alkyleneoxide is/are replaced with —CO—. At least two of Ra to Rd may be fused to form a ring. The non-aqueous electrolyte according to one embodiment of the present invention improves the cycle-life characteristic of high capacity battery by forming a stable passivation film in the interface between the negative electrode and the non-aqueous electrolyte and increasing the concentration of lithium ion in electrolyte.
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