Patent ID: 11888102
Assignee: SK ON CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A cathode active material for a lithium secondary battery, comprising:
a lithium metal oxide particle; and
a boron (B) element present on at least a portion of a surface of the lithium metal oxide particle,
wherein a ratio of a B+ peak intensity relative to a sum of peak intensities of Li+, B+, and LiB+ fragments by a TOF-SIMS (Time of Flight Secondary Ion Mass Spectrometry) analysis measured from a surface of the lithium metal oxide particle is in a range from 0.03% to 1.5%, and
the lithium metal oxide particle includes a lithium nickel-based metal oxide represented by Chemical Formula 1:

LixNiyM1-yO2  [Chemical Formula 1]

wherein, in Chemical Formula 1, 0.95<x<1.08, 0.8≤y≤0.93, and M includes at least one element selected from the group consisting of Co, Mn, Al, Zr, Ti, B, Mg, and Ba.