公开(公告)号：US20220388865A1

公开(公告)日：2022-12-08

申请号：US17804999

申请日：2022-06-01

Applicant: Samsung SDI Co., Ltd.

Inventor： Soohyeon KIM ,  Sungsoo KIM ,  Jangwook LEE ,  Seungyeon CHOI

IPC: C01G53/00 ,  H01M10/0525 ,  C01F17/32

Abstract: A composite cathode active material, a method of preparing the composite cathode active material, and a lithium secondary battery including a cathode including the composite cathode active material are provided. The composite cathode active material includes: a nickel-based active material including about 60 mol % or more of nickel; and a coating layer on a surface of the nickel-based active material, the coating layer including a lanthanide composite. The composite cathode active material includes or is in the form of single crystal particles having an average particle diameter in a range of about 2 μm to about 8 μm.