Patent ID: 11955632
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 4:
5. A positive active material for a rechargeable lithium battery prepared from the positive active material precursor of claim 1, the positive active material comprising:
a nickel-based lithium transition metal oxide represented by Chemical Formula 2 comprising a second set of secondary particles including a second plurality of primary particles aggregated to each other:

LiaNixCoyM1-x-yO2,

wherein M is at least one selected from Mn, Ni, Co, Al, Fe, V, Ti, Mg, Zr, B, F, and Cr, 0.9≤a≤1.1, 0.3≤x≤1, 0≤y≤0.7, and 0.3≤x+y≤1.