公开(公告)号：EP4068429A1

公开(公告)日：2022-10-05

申请号：EP21872742.8

申请日：2021-08-25

申请人： Lg Chem, Ltd.

发明人： KWAK, No-Woo ,  KIM, Ji-Hye ,  PARK, Na-Ri ,  EOM, Jun-Ho ,  YEO, Soo-Jung ,  LEE, Jun-Won ,  LIM, Chae-Jin ,  JUNG, Byoung-Hun

IPC分类号： H01M4/36 ,  H01M4/62 ,  H01M4/525 ,  H01M4/505 ,  H01M10/052 ,  C01B35/12 ,  C01G39/00 ,  C01G53/00 ,  H01M4/02

摘要： There is provided a positive electrode active material for a lithium secondary battery for improving the output and stability and a method for manufacturing the same. The positive electrode active material according to the present disclosure comprises a coating layer on a surface of a positive electrode active material powder for a lithium secondary battery, the coating layer comprising a lithium molybdenum compound.

公开(公告)号：EP4207374A1

公开(公告)日：2023-07-05

申请号：EP22856310.2

申请日：2022-08-16

申请人： LG CHEM, LTD.

发明人： KWAK, No-Woo ,  KIM, Ji-Hye ,  EOM, Jun-Ho ,  LEE, Jun-Won

IPC分类号： H01M4/36 ,  H01M4/62 ,  H01M4/525 ,  H01M4/505 ,  C01G53/00 ,  H01M10/052

摘要： Provided are a positive electrode active material for a lithium secondary battery, improved in terms of high-temperature life and an increase in resistance, and a method for preparing the same. The positive electrode active material includes a lithium boron compound coating layer on the surface of a powder of a positive electrode active material for a lithium secondary battery, wherein the coating layer shows a peak intensity ratio of two optional peaks in the spectrum of Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS), equal to the peak intensity ratio of the corresponding peaks of LiBO 2 compound within a range of ±50%.