Patent ID: 6846592

Claim:
A positive electrode for a rechargeable lithium battery, comprising: a current collector, a positive active material layer coated on said current collector, said positive active material layer comprising a positive active material; and a surface-treatment layer on said positive active material layer such that said positive active material layer is disposed between said surface-treatment layer and said current collector, said surface treatment layer comprising a compound selected from the group consisting of a coating-element-included hydroxide, a coating-element-included oxyhydroxide, a coating-element-included oxycarbonate, and a coating-element-included hydroxycarbonate, wherein: the surface-treatment layer comprises a coating-element selected from the group consisting of Mg, Al, Co, K, Na, Ca, Si, Ti, Sn, V, Ge, Ga, B, As, and Zr, said positive active material comprises a lithiated compound selected from the group consisting of compounds represented by the formulas 1 to 13: Li x Mn 1-y M y A 2 (1) Li x Mn 1-y M y O 2-z X z (2) Li x Mn 2 O 4-z X z (3) Li x Mn 2-y M y A 4 (4) Li x Co 1-y M y A 2 (5) Li x Co 1-y M y O 2-z X z (6) Li x Ni 1-y M y A 2 (7) Li x Ni 1-y M y O 2-z X z (8) Li x Ni 1-y Co y O 2-z X z (9) Li x Ni 1-y-z Co y M z A α (10) Li x Ni 1-y-z Co y M z O 2-α X α (11) Li x Ni 1-y-z Mn y M z A α (12) Li x Ni 1-y-z Mn y M z O 2-α X α (13) 0.95≦×≦1.1; 0 ≦y ≦0.5; 0≦≧≦0.5; 0≦α≦2, M is one element selected from the group consisting of Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, and rare earth elements, A is selected from the group consisting of O, F, S, and P, and X is selected from the group consisting of F, S, and P.