公开(公告)号：US20220131145A1

公开(公告)日：2022-04-28

申请号：US17508435

申请日：2021-10-22

申请人： SK INNOVATION CO., LTD.

发明人： Sung Soon Park ,  Ji Hoon Choi ,  Jik Soo Kim ,  Kwang Ho Lee ,  Jeong Hoon Jeun

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

摘要： The cathode active material according to embodiments of the present invention includes a lithium composite oxide particle having a form of secondary particle in which a plurality of primary particle are aggregated, wherein the primary particles respectively include a lithium conduction pathway through which lithium ions are diffused. Wherein the primary particles include a first particle, and the first particle has an angle of 45° to 90° formed by a direction from a center of the first particle to a center of the lithium composite oxide particle and a direction of the lithium conduction pathway included in the first particle, wherein a ratio of the number of the first particles among the primary particles located on a surface of the lithium composite oxide particle is 20% or more.

公开(公告)号：US12113217B2

公开(公告)日：2024-10-08

申请号：US18501932

申请日：2023-11-03

申请人： SK INNOVATION CO., LTD. ,  SK ON CO., LTD.

发明人： Ji Yae Do ,  Min Suk Kang ,  Min Cheol Beak ,  Kwang Ho Lee ,  Wan Uk Choi

IPC分类号： H01M4/58 ,  C01B25/45 ,  H01M4/131 ,  H01M10/052 ,  H01M4/02

CPC分类号： H01M4/5825 ,  C01B25/45 ,  H01M4/131 ,  H01M10/052 ,  C01P2002/54 ,  C01P2002/60 ,  C01P2002/72 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/028

摘要： Cathode active materials for lithium secondary batteries and lithium secondary batteries including the cathode active materials are disclosed. In some implementations, a cathode active material for a lithium secondary battery includes a lithium metal phosphate particle having a crystallite size in a range from 150 nm to 450 nm in a direction of a crystallographic plane (020) as measured by an X-ray diffraction (XRD) analysis. In some implementations, a lithium secondary battery includes a cathode including a cathode active material layer that includes a cathode active material for a lithium secondary battery, and an anode facing the cathode. In some implementations, an electrode crystallite size ratio defined by Equation 4 is in a range from 0.5 to 0.9.