Samsung Sdi Co., Inc.

Dae-Hoe Lee

Do-Hyung Park

Yong-Chan You

Min-Han Kim

A positive active material for a rechargeable lithium battery includes a compound represented by Chemical Formula 1, LiNiCoMeMMOwherein, 0.9&#x2264;a&#x2264;1.1, 0.7&#x2264;x&#x2264;0.93, 0&#x3c;y&#x2264;0.3, 0&#x3c;z&#x2264;0.3, 0.001&#x2264;k&#x2264;0.006, 0.001&#x2264;p&#x2264;0.005, x+y+z+k+p=1, Me is Mn or Al, Mis a divalent element, and Mis a tetravalent element.

Positive active material for rechargeable lithium battery and rechargeable lithium battery including same

A positive active material for a rechargeable lithium battery includes a core including a compound represented by Chemical Formula 1 and a structure-stabilizing compound on a surface of the core. The structure-stabilizing compound includes an Al compound or a Co compound. Chemical Formula 1 is LiNiCoMeMOFwhere 0.9&#x2264;a&#x2264;1.1, 0.7&#x2264;x&#x2264;0.93, 0&#x3c;y&#x2264;0.3, 0&#x3c;z&#x2264;0.3, 0&#x2264;k&#x2264;0.005, x+y+z+k=1, 0&#x2264;p&#x2264;0.005, Me is Mn or Al, and M1 is Mg, Ba, B, La, Y, Ti, Zr, Mn, Si, V, P, Mo, W, or a combination thereof.

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Yongin-si, South Korea

Dae-Hoe Lee