CPC H01M 10/0569 (2013.01) [H01M 4/386 (2013.01); H01M 10/0525 (2013.01); H01M 10/0567 (2013.01); H01M 50/414 (2021.01); H01M 50/434 (2021.01); H01M 50/446 (2021.01); H01M 50/451 (2021.01); H01M 50/457 (2021.01); H01M 2300/004 (2013.01); H01M 2300/0042 (2013.01)] | 15 Claims |
1. A rechargeable lithium battery comprising:
a positive electrode comprising a positive active material comprising nickel and represented by LiaNibEcGdO2 (0.90≤a≤1.8, 0≤b≤0.9, 0≤c≤0.5 and 0.001≤d≤0.1, E is Co; G is Al, Cr, Mn, Fe, Mg, La, Ce, Sr, V, or combinations thereof);
a negative electrode comprising a negative active material comprising a Si-based material and a carbon-based material, the Si-based material being a composite consisting of Si and C, or silicon oxide, or a combination thereof;
an electrolyte solution comprising:
a lithium salt, a non-aqueous organic solvent, and an additive;
the non-aqueous organic solvent comprising a cyclic carbonate and a linear carbonate, the linear carbonate comprising ethylmethyl carbonate and dimethyl carbonate; and
the additive comprising at least one selected from fluoroethylene carbonate, propane sultone, succinonitrile, adiponitrile, or combinations thereof;
a separator between the positive electrode and the negative electrode, the separator comprising a porous substrate and a coating layer positioned on at least one side of the porous substrate, the coating layer comprising an inorganic compound comprising Al (Aluminum).
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