公开(公告)号：US20210234154A1

公开(公告)日：2021-07-29

申请号：US16652405

申请日：2020-03-17

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kai WANG ,  Tao LI ,  Meng WANG ,  Pengwei CHEN

IPC: H01M4/36 ,  H01M4/525 ,  H01M4/52 ,  H01M10/0525

Abstract: The present application relates to a cathode material and an electrochemical device comprising the same. In particular, the present application relates to a cathode material having a surface heterophasic structure, wherein the cathode material includes a lithium cobalt oxide and an oxide of cobalt, wherein a Raman spectrum of the cathode material has characteristic peaks in the range of about 470 cm−1 to about 530 cm −1, about 560 cm−1 to about 630 cm −1 and about 650 cm −1 to about 750 cm−1, and wherein the surface heterophasic structure of the cathode material includes the lithium cobalt oxide and the oxide of cobalt. The electrochemical device using the cathode material having a surface heterophasic structure of the present application can exhibit excellent cycle performance and thermal stability.