公开(公告)号：US11791457B2

公开(公告)日：2023-10-17

申请号：US17158503

申请日：2021-01-26

申请人： SK ON CO., LTD.

发明人： Jee Hee Lee ,  Joon Sup Kim ,  Nam Hyung Kim ,  Yeong Uk Son ,  Yoon Kwang Lee ,  Jae Phil Cho

IPC分类号： H01M4/36 ,  H01M4/38 ,  H01M4/58 ,  H01M4/13 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/1395 ,  H01M4/134 ,  H01M4/1393 ,  H01M4/133 ,  H01M4/02

CPC分类号： H01M4/366 ,  H01M4/0428 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/386 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

摘要： Provided are an anode active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery containing the same. The present invention provides an anode active material for a lithium secondary battery including: a carbon based particle; a first carbon coating layer positioned on the carbon based particle and including pores; a silicon coating layer positioned on the pores and/or a pore-free surface of the first carbon coating layer; and second carbon coating layer positioned on the silicon coating layer, a method of preparing the same, and a lithium secondary battery containing the same.

公开(公告)号：US20230299296A1

公开(公告)日：2023-09-21

申请号：US18323434

申请日：2023-05-25

申请人： SK ON CO., LTD.

发明人： Joon Sup Kim ,  Sun Young Kim ,  Dong Gun Lee ,  Jee Hee Lee

IPC分类号： H01M4/62 ,  H01M4/133 ,  H01M4/134 ,  H01M4/36 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/38

CPC分类号： H01M4/622 ,  H01M4/133 ,  H01M4/134 ,  H01M4/364 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/386 ,  H01M2004/027

摘要： A binder for a secondary battery includes a copolymer having a first repeating unit, a second repeating unit, and a third repeating unit. A ratio of a number of the first repeating unit (A) and a sum of a number of the second repeating unit and a number of the third repeating unit (B) is 90:10 to 52:48. A ratio of the number of the second repeating unit and the number of the third repeating unit is 67:33 to 1:99. A weight average molecular weight of the copolymer is 225,000 to 2,000,000.

公开(公告)号：US11699791B2

公开(公告)日：2023-07-11

申请号：US16992592

申请日：2020-08-13

申请人： SK ON CO., LTD.

发明人： Joon Sup Kim ,  Sun Young Kim ,  Dong Gun Lee ,  Jee Hee Lee

IPC分类号： H01M4/62 ,  H01M4/133 ,  H01M4/134 ,  H01M4/36 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/02

CPC分类号： H01M4/622 ,  H01M4/133 ,  H01M4/134 ,  H01M4/364 ,  H01M4/386 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/027

摘要： A binder for a secondary battery includes a copolymer having a first repeating unit, a second repeating unit, and a third repeating unit. A ratio of a number of the first repeating unit (A) and a sum of a number of the second repeating unit and a number of the third repeating unit (B) is 90:10 to 52:48. A ratio of the number of the second repeating unit and the number of the third repeating unit is 67:33 to 1:99. A weight average molecular weight of the copolymer is 225,000 to 2,000,000.