公开(公告)号：US09660260B2

公开(公告)日：2017-05-23

申请号：US14842752

申请日：2015-09-01

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Si Hyoung Oh ,  Byung Won Cho ,  Kyung Yoon Chung ,  Hae Ri Lee

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/58 ,  H01M10/052 ,  H01M4/02

CPC classification number: H01M4/366 ,  H01M4/505 ,  H01M4/5825 ,  H01M10/052 ,  H01M2004/028 ,  Y02E60/122

Abstract: Provided are a cathode active material coated with a fluorine-doped spinel-structured lithium metal manganese oxide, a lithium secondary battery including the same, and a method for preparing the same. The cathode active material has improved chemical stability and provides improved charge/discharge characteristics at elevated temperature (55-60° C.) and high rate. The cathode active material allows lithium ions to pass through the coating layer with ease and is chemically stable, and thus may be used effectively as a cathode active material for a high-power lithium secondary battery.