公开(公告)号：EP4280303A1

公开(公告)日：2023-11-22

申请号：EP23173885.7

申请日：2023-05-17

申请人： SK On Co., Ltd. ,  SK Innovation Co., Ltd.

发明人： LEE, Sang Han ,  LEE, Ju Wook ,  LEE, Jong Hyuk ,  KIM, Jung Hwan ,  PARK, Soo Min ,  CHO, In Haeng ,  HA, Dong Wook

IPC分类号： H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0565

摘要： A cathode (100) for a lithium secondary battery includes a cathode current collector, and a cathode active material layer (110) satisfying a specific formula formed on the cathode current collector (105). The cathode active material layer (110) includes lithium metal oxide particles that have a single-particle shape, and a single-crystalline structure or a poly-crystalline structure including two or more single crystals. A lithium secondary battery including the cathode (100), and a method of preparing a cathode active material are also provided.

公开(公告)号：EP4213263A3

公开(公告)日：2023-10-11

申请号：EP23150762.5

申请日：2023-01-09

申请人： SK On Co., Ltd.

发明人： CHO, In Haeng ,  SHIM, Yu Na ,  KIM, Moon Sung ,  KIM, Sung Jin ,  PARK, Soo Min ,  LEE, Min Young ,  LEE, Jin Hong

IPC分类号： H01M10/0525 ,  H01M10/0567 ,  H01M10/0569

摘要： An electrolyte solution for a lithium secondary battery includes an organic solvent, a lithium salt, and a fluorine-based additive in which a terminal difluoro-phosphite group (-OPF 2 ) is bonded to a branched saturated hydrocarbon group. The fluorine-based additive prevent side reactions in the electrolyte solution to improve stability of a cathode active material.

公开(公告)号：EP4216297A1

公开(公告)日：2023-07-26

申请号：EP22217277.7

申请日：2022-12-30

申请人： SK On Co., Ltd.

发明人： KIM, Jung Hwan ,  HA, Dong Wook ,  PARK, Soo Min ,  LEE, Sang Han ,  LEE, Jong Hyuk ,  CHO, In Haeng

IPC分类号： H01M4/02 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/36 ,  H01M10/052

摘要： A cathode for a lithium secondary battery according to embodiments of the present invention includes a cathode current collector, and a cathode active material layer formed on the cathode current collector. The cathode active material layer includes first lithium metal oxide particles each having a secondary particle shape in which primary particles are aggregated and second lithium metal oxide particles each having a single particle shape. A cross-section of the cathode active material layer from an SEM satisfies Equations 1 and 2.

公开(公告)号：EP4213263A2

公开(公告)日：2023-07-19

申请号：EP23150762.5

申请日：2023-01-09

申请人： SK On Co., Ltd.

发明人： CHO, In Haeng ,  SHIM, Yu Na ,  KIM, Moon Sung ,  KIM, Sung Jin ,  PARK, Soo Min ,  LEE, Min Young ,  LEE, Jin Hong

IPC分类号： H01M10/0525 ,  H01M10/0567 ,  H01M10/0569

摘要： An electrolyte solution for a lithium secondary battery includes an organic solvent, a lithium salt, and a fluorine-based additive in which a terminal difluoro-phosphite group (-OPF 2 ) is bonded to a branched saturated hydrocarbon group. The fluorine-based additive prevent side reactions in the electrolyte solution to improve stability of a cathode active material.