Lithium secondary battery having improved low-temperature characteristics and high-temperature characteristics

A lithium secondary battery comprising:

• a positive electrode including a positive electrode material mixture layer formed on a positive electrode collector, wherein the positive electrode material mixture layer has a loading capacity of 3.7 mAh/cm2 to 10 mAh/cm2;
• a negative electrode including a negative electrode material mixture layer formed on a negative electrode collector;
• a separator disposed between the positive electrode and the negative electrode;
• and
• a non-aqueous electrolyte solution including a lithium salt, an organic solvent, and a compound represented by Formula 1,
• a concentration of lithium salt in the non-aqueous solution is 1.5 M to 3 M,
• wherein the organic solvent is a mixed solvent including a cyclic carbonate-based organic solvent and a linear carbonate-based organic solvent, and
• wherein the compound represented by Formula 1 is present in an amount of 0.1 wt % to 5 wt % based on a total weight of the non-aqueous electrolyte solution:
• wherein, in Formula 1,
• R1 is an alkylene group having 1 to 5 carbon atoms which is unsubstituted or substituted with fluorine, or —R1′—O—, wherein R1′ is an alkylene group having 1 to 5 carbon atoms which is unsubstituted or substituted with fluorine,
• R2 is an alkylene group having 1 to 3 carbon atoms which is unsubstituted or substituted with fluorine, or —R2′—O—, wherein R2′ is an alkylene group having 1 to 3 carbon atoms which is unsubstituted or substituted with fluorine,
• R3 is an alkylene group having 1 to 5 carbon atoms which is unsubstituted or substituted with fluorine,
• R4 is an aliphatic hydrocarbon group or an aromatic hydrocarbon group,
• Ra and Rb are each independently hydrogen or an alkyl group having 1 to 3 carbon atoms,
• o, p, q, and r are the numbers of repeating units,
• is an integer of 1 to 5,
• p is an integer of 1 to 10,
• r is an integer of 1 to 5,
• q is an integer of 4-2 to 15, and
• b and c are each independently an integer of 1 to 3.