公开(公告)号：US20190355988A1

公开(公告)日：2019-11-21

申请号：US16158639

申请日：2018-10-12

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Ye LANG ,  Gang PENG ,  Leimin XU ,  Yousong CHENG

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

Abstract: The present application relates to a cathode material and a lithium ion battery. Particularly, the cathode material includes a matrix and a coating layer, wherein the matrix includes lithium cobalt oxide bulk-doped with metal element M, and the coating layer has a spinel phase structure doped with metal element Me. The spinel phase structure can form three-dimensional lithium ion channels, thereby increasing a diffusion path of lithium ions, and introducing more electrochemical reaction active sites. Therefore, when the lithium ion battery with the cathode material is discharged at a current of about 6 C at about −10° C., a capacity retention rate is up to about 99% or above as compared with that when the current is about 0.5 C. At the same time, the lithium ion battery also has high temperature stability, and has excellent cycle performance in high-temperature heavy-current charge-discharge environments.