Patent ID: 11955631
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 0:
1. A composite cathode active material for an organic electrolyte or solid electrolyte lithium battery comprising:
a core comprising a plurality of primary particles; and
a shell disposed on the core,
wherein
a primary particle of the plurality of primary particles includes a lithium nickel transition metal oxide, and

the shell includes a first composition and a second composition, wherein the first composition contains a first metal and the second composition contains a second metal, wherein
the first metal comprises nickel and cobalt,
the second metal comprises cerium, and

the first composition comprises a first phase and the second composition comprises a second phase that is distinguishable from the first phase,
wherein the first composition comprises a phase having a layered crystal structure and a phase having a spinel crystal structure,
wherein the core comprises a grain boundary between primary particles of the plurality of primary particles, and the grain boundary comprises Zr,
wherein the grain boundary comprises a third composition comprising a third phase having a monoclinic crystal structure, and the structure of the third composition belongs to a C2/m, C12/c1, or C2/c space group, wherein the lithium nickel transition metal oxide is represented by Formula 4:

LiaM4O2-αXα  Formula 4

wherein in Formula 4,
0.9≤a≤1.2 and 0≤α<2,
M4 comprises nickel, a fourth metal, and a fifth metal, wherein the fourth metal is an element of Groups 2 to 13 of the Periodic Table and is different from nickel and the fifth metal,
X is F, S, or P, and
the amount of nickel in M4 is about 70 mole percent to less than about 100 mole percent, based on a total content of the lithium nickel transition metal oxide.