Rechargeable lithium battery

A rechargeable lithium battery, comprising:

• a positive electrode comprising a positive active material comprising at least one selected from the group consisting of compounds of the following Formulas 2 to 25:
• LiaA1−bBbD2, Formula 2:
• wherein 0.95≦a≦1.1 and 0≦b≦0.5;
• LiaE1−bBbO2−cFc, Formula 3:
• wherein 0.95≦a≦1.1, 0≦b≦0.5, and 0≦c≦0.05;
• LiE2−bBbO4−cFc, Formula 4:
• wherein 0≦b≦0.5 and 0≦c≦0.05;
• LiaNi1−b−cCobBcDα, Formula 5:
• wherein 0.95≦a≦1.1, 0≦b≦0.5, 0≦c≦0.05, and 0<α≦2;
• LiaNi1−b−cCobBcO2−αFα, Formula 6:
• wherein 0.95≦a≦1.1, 0≦b≦0.5, 0≦c≦0.05, and 0<α<2;
• LiaNi1−b−cCObBcO2−αF2, Formula 7:
• wherein 0.95≦a≦1.1, 0≦b≦0.5, 0≦c≦0.05, and 0<α<2;
• LiaNi1−b−cMnbBcDα, Formula 8:
• wherein 0.95≦a≦1.1, 0≦b≦0.5, 0≦c≦0.05, and 0<α≦2,
• LiaNi1−b−cMnbBcO2−αFα, Formula 9:
• wherein, 0.95≦a≦1.1, 0≦b≦0.5, 0≦c≦0.05, and 0<α<2;
• LiaNi1−b−cMnbBcO2−αF2, Formula 10:
• wherein 0.95≦a≦1.1, 0≦b≦0.5, 0≦c≦0.05, and 0<α<2;
• LiaNibEcGdO2, Formula 11:
• wherein 0.90≦a≦1.1, 0≦b≦0.9, 0≦c≦0.5, and 0.001≦d ≦0.1;
• LiaNibCOcMndGeO2, Formula 12:
• wherein 0.90≦a≦1.1, 0≦b≦0.9, 0≦c≦0.5, 0≦d≦0.5, and 0.001≦e≦0.1;
• LiaNiGbO2, Formula 13:
• wherein 0.90≦a≦1.1 and 0.001≦b≦0.1;
• LiaCOGbO2, Formula 14:
• wherein 0.90≦a≦1.1 and 0.001≦b≦0.1;
• LiaMnGbO2, Formula 15:
• wherein 0.90≦a≦1.1 and 0.001≦b≦0.1;
• LiaMn2GbO4, Formula 16:
• wherein 0.90≦a≦1.1 and 0.001≦b≦0.1;
• QO2;
• Formula 17:
• QS2;
• Formula 18:
• LiQS2;
• Formula 19:
• V2O5;
• Formula 20:
• LiV2O5;
• Formula 21:
• LiIO2;
• Formula 22:
• LiNiVO4;
• Formula 23:
• Li3−fJ2(PO4)3(0≦f≦3);
• Formula 24:
• and
• Li3−fFe2(PO4)3(0≦f≦2), Formula 25:
• wherein,
• A is selected from the group consisting of Ni, Co, Mn, and a combination thereof,
• B is selected from the group consisting of Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, a rare earth element, and a combination thereof,
• D is selected from the group consisting of O, F, S, P, and a combination thereof,
• E is selected from the group consisting of Co, Mn, and a combination thereof,
• F is selected from the group consisting of F, S, P, and a combination thereof,
• G is a transition element or a lanthanide element selected from the group consisting of Al, Cr, Mn, Fe, Mg, La, Ce, Sr, V, and a combination thereof,
• Q is an element selected from the group consisting of Ti, Mo, Mn, and a combination thereof,
• I is an element selected from the group consisting of Cr, V, Fe, Sc, Y, and a combination thereof, and
• J is an element selected from the group consisting of V, Cr, Mn, Co, Ni, Cu, and a combination thereof;
• a negative electrode comprising a negative active material;
• and
• a non-aqueous electrolyte comprising a nitrile-based compound, a non-aqueous organic solvent, and a lithium salt, the nitrile-based compound being present in an amount of about 0.1 to about 10 wt % based on the total weight of the non-aqueous electrolyte, the nitrile-based compound comprising at least one selected from the group consisting of succinonitrile, adiponitrile and a combination thereof,
• wherein the positive electrode has an active-mass density of about 3.95 to about 4,1 g/cc.