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

Claim 28:
29. The composite cathode active material of claim 1, wherein the core has an average grain boundary length of about 50 nm to about 1000 nm and an average grain boundary thickness of about 1 nm to about 200 nm, wherein a length direction of the grain boundary is a direction that is parallel to a surface of the primary particles adjacent thereto, and a thickness direction of the grain boundary is a direction that is perpendicular to the surface of the primary particles adjacent thereto, wherein the average grain boundary length is an average value of lengths of grain boundaries arranged in a first direction, and the average grain boundary thickness is an average value of thicknesses of grain boundaries arranged in a second direction.