| 摘要 |
A rechargeable lithium battery includes: a positive electrode including a positive active material; and an electrolyte solution including a solvent and an additive, wherein the positive active material includes a lithium-containing transition metal oxide, the solvent includes a hydrofluoroether, and the additive includes a first additive represented by Chemical Formula 1 and at least one selected from a second additive represented by Chemical Formula 2, a third additive represented by Chemical Formula 3, and a fourth additive represented by Chemical Formula 4.; |
| 主权项 |
1. A rechargeable lithium battery, comprising:
a positive electrode comprising a positive active material; and an electrolyte solution comprising a solvent and an additive, wherein the positive active material comprises a lithium-containing transition metal oxide, the solvent comprises hydrofluoroether, and the additive comprises:
a first additive represented by Chemical Formula 1, andat least one selected from a second additive represented by Chemical Formula 2, a third additive represented by Chemical Formula 3, and a fourth additive represented by Chemical Formula 4: wherein, in Chemical Formula 1, R1 to R3 are each independently selected from a C1 to C8 alkyl group substituted or unsubstituted with a vinyl group or a C1 to C5 alkyl group and not including a double bond, a C1 to C8 alkyl group substituted or unsubstituted with a vinyl group or a C1 to C5 alkyl group and including a double bond, a C2 to C8 alkenyl group, a C5 to C8 cycloalkyl group, a C6 to C8 aryl group, and a fluorine atom, and R4 is selected from a C1 to C8 alkylene group, a C2 to C8 alkynylene group, a C4 to C8 alkylene group having at least one selected from an ether group and a thioether group a C1 to C8 alkylene group having a plurality of —CF2— linking groups, and a C4 to C10 alkylene group having an ether group and a thioether group, wherein, in Chemical Formula 2, R5 is selected from a C2 to C6 alkylene group without a double bond, a C2 to C6 alkylene group with a double bond, and a C6 to C12 arylene group, and R6 to R11 are each independently selected from a C1 to C6 alkyl group and a C2 to C6 alkenyl group, wherein, in Chemical Formula 3, R12 and R13 are each independently selected from hydrogen and a C1 to C8 alkyl group, and R14 is selected from a C1 to C8 alkyl group substituted or unsubstituted with a vinyl group, a C2 to C8 alkenyl group, a C2 to C8 alkynyl group, and a C1 to C8 halogenated alkyl group, wherein, in Chemical Formula 4, R15 and R16 are each independently selected from hydrogen and a C1 to C8 alkyl group, R17 is selected from a C1 to C8 alkyl group, a C2 to C8 alkenyl group, a C2 to C8 alkynyl group, and a C1 to C8 halogenated alkyl group, and n is 1 or 2. |
