Patent ID: 11894558
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC H

Claim 9:
10. A method of preparing a positive electrode active material, the method comprising:
preparing carbon-based particles, and disposing the carbon-based particles on a core,
wherein the preparing of the carbon-based particles comprises preparing preliminary carbon-based particles, and modifying the preliminary carbon-based particles by an oxidation treatment,
wherein the modifying of the preliminary carbon-based particles by the oxidation treatment comprises at least one of
a) performing a first heat treatment of the preliminary carbon-based particles at a temperature of 200° C. to 800° C. in at least one atmosphere of an oxygen atmosphere and an air atmosphere; and
b) reacting the preliminary carbon-based particles with an acidic vapor at 120° C. to 300° C., and
the core comprises Li1+xMO2+y, wherein M is at least one element selected from the group consisting of nickel (Ni), cobalt (Co), and copper (Cu), and 1≤x≤5 and 0≤y≤2.