| 摘要 |
The present invention provides a positive electrode active material for lithium ion batteries having excellent battery property. The positive electrode active material for lithium ion batteries is represented by composition formula: LixNi1-yMyO2+alpha, wherein M is Co as an essential component and at least one species selected from a group consisting of Sc, Ti, V, Cr, Mn, Fe, Cu, Zn, Ga, Ge, Al, Bi, Sn, Mg, Ca, B and Zr, 0.9@x@1.2, 0<y@0.7, alpha>0.05, and an average particle size (D50) is 5 mum to 15 mum.
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