公开(公告)号：US20230238527A1

公开(公告)日：2023-07-27

申请号：US18099498

申请日：2023-01-20

申请人： SK Innovation Co., Ltd. ,  SK ON CO., LTD.

发明人： Hee Jun Kweon ,  Sang Bok Kim ,  Sang Min Park ,  Sang Hye Shin ,  Tae Kyoung Lee ,  Ji Hoon Choi

IPC分类号： H01M4/525 ,  H01M4/505

CPC分类号： H01M4/525 ,  H01M4/505 ,  H01M2004/028

摘要： A cathode active material for a lithium secondary battery according to an embodiment of the present invention includes a lithium metal oxide particle that contains tungsten and has a secondary shape in which a plurality of primary particles are aggregated. The lithium metal oxide particle includes a sulfur-containing portion formed between the primary particles in an inner region of the lithium metal oxide particle.

公开(公告)号：US20220320575A1

公开(公告)日：2022-10-06

申请号：US17709886

申请日：2022-03-31

申请人： SK ON CO., LTD.

发明人： Yeong Bin Yoo ,  Ji Hoon Choi ,  Kook Hyun Han ,  Hee Jun Kweon

IPC分类号： H01M10/0525 ,  H01M4/36 ,  H01M4/485 ,  H01M4/1391 ,  H01M10/054

摘要： A cathode active material for a lithium secondary battery includes a lithium-transition metal composite oxide particle having a single particle shape, and a first coating layer formed on a surface of the lithium-transition metal composite oxide particle. The first coating layer includes a La—Zr—O compound. Life-span and capacity properties are improved by a combination of the lithium-transition metal composite oxide particle having the single particle shape and the first coating layer formed thereon.

公开(公告)号：US12024441B1

公开(公告)日：2024-07-02

申请号：US18448976

申请日：2023-08-14

申请人： SK ON CO., LTD.

发明人： Hee Jun Kweon ,  Jeong Bae Yoon ,  Ji Hoon Choi

IPC分类号： C01G53/00 ,  H01M4/525 ,  H01M10/0525

CPC分类号： C01G53/50 ,  H01M4/525 ,  H01M10/0525 ,  C01P2002/60 ,  C01P2002/74 ,  C01P2002/76

摘要： A cathode active material for a lithium secondary battery has a structure of a lithium-nickel-based metal oxide. A crystal size in a (104) plane defined by Equation 1 is less than 200 nm. A thickness of a TM slab measured by a Rietveld method in a crystal structure of a space group R-3m by an X-ray diffraction (XRD) analysis is 2.15 Å or less. A thickness of a Li slab thickness measured by the Rietveld method in the crystal structure of the space group R-3m by the XRD analysis is 2.585 Å or more.

公开(公告)号：US20220311006A1

公开(公告)日：2022-09-29

申请号：US17702838

申请日：2022-03-24

申请人： SK ON CO., LTD.

发明人： Hee Jun Kweon ,  Yeong Bin Yoo ,  Ji Hoon Choi ,  Kook Hyun Han

IPC分类号： H01M4/62 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525

摘要： A cathode active material for a lithium secondary battery according to an embodiment of the present invention includes a lithium-transition metal composite oxide particle having a single particle shape, and a first coating layer formed on a surface of the lithium-transition metal composite oxide particle. The first coating layer includes a Sr—Zr—O compound. Life-span and capacity properties are improved by a combination of the lithium-transition metal composite oxide particle having the single particle shape and the first coating layer formed thereon.