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公开(公告)号：US20230238527A1
公开(公告)日：2023-07-27
申请号：US18099498
申请日：2023-01-20
发明人： Hee Jun Kweon , Sang Bok Kim , Sang Min Park , Sang Hye Shin , Tae Kyoung Lee , Ji Hoon Choi
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.
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公开(公告)号：US20220131145A1
公开(公告)日：2022-04-28
申请号：US17508435
申请日：2021-10-22
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.
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公开(公告)号：US11031590B2
公开(公告)日：2021-06-08
申请号：US16399407
申请日：2019-04-30
发明人： Mi Jung Noh , Jik Soo Kim , Sang Bok Kim , Ji Hoon Choi , Kook Hyun Han
摘要： A cathode active material for a lithium secondary battery includes a lithium-aluminum-titanium oxide formed on a surface of a lithium metal oxide particle having a specific formula. The cathode active material may have an improved structural stability even in a high temperature condition.
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公开(公告)号：US12132198B2
公开(公告)日：2024-10-29
申请号：US17994177
申请日：2022-11-25
发明人： Sang Bok Kim , Sang Hye Shin , Sang Min Park , Tae Kyoung Lee , Myoung Lae Kim , Jeong Bae Yoon , Jik Soo Kim , Ji Hoon Choi
CPC分类号： H01M4/364 , H01M4/505 , H01M4/525 , H01M4/60 , H01M10/0525 , H01M2004/028
摘要： The cathode active material for a lithium secondary battery according to embodiments of the present invention includes a lithium-transition metal composite oxide particle including a plurality of primary particles, and the lithium-transition metal composite oxide particle includes a lithium-sulfur-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by preventing the layer structure deformation of the primary particles and removing residual lithium.
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公开(公告)号：US20220216469A1
公开(公告)日：2022-07-07
申请号：US17569861
申请日：2022-01-06
发明人： Sang Bok Kim , Tae Kyoung Lee , Mi Jung Noh , Ji Hoon Choi , Dong Wook Ha
IPC分类号： H01M4/525 , H01M4/505 , H01M4/04 , H01M10/0525
摘要： A cathode active material for a lithium secondary battery is provided. According to embodiments of the present invention, the cathode active material includes a lithium-transition metal composite oxide particle including a plurality of primary particles. The lithium-transition metal composite oxide particle has a lithium-boron-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by removing residual lithium.
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6.发明申请公开(公告)号：US20210074996A1
公开(公告)日：2021-03-11
申请号：US17014314
申请日：2020-09-08
发明人： Sang Bok Kim , Ji Hoon Choi , Jik Soo Kim , Mi Jung Noh , Dong Il Jang , Dong Wook Ha
IPC分类号： H01M4/131 , H01M4/1391 , H01M4/134 , H01M4/1395 , H01M4/04 , H01M4/525 , H01M4/505 , H01M4/36 , H01M10/0525
摘要： In a method of manufacturing a cathode active material for a lithium secondary battery, a preliminary lithium metal oxide particle is prepared. The preliminary lithium metal oxide particle is cleaned using a boron compound cleaning solution. A cathode active material for a lithium secondary particle includes a lithium metal oxide particle where a ratio of a B+ peak intensity relative to a sum of peak intensities of Li+, B+ and LiB+ fragments by a TOF-SIMS analysis is in a range from 0.03% to 1.5%.
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公开(公告)号：US12068475B2
公开(公告)日：2024-08-20
申请号：US17326461
申请日：2021-05-21
发明人： Mi Jung Noh , Jik Soo Kim , Sang Bok Kim , Ji Hoon Choi , Kook Hyun Han
CPC分类号： H01M4/366 , C01G53/50 , H01M4/485 , H01M4/525 , H01M10/0525 , C01P2004/01 , C01P2004/03 , C01P2004/62 , C01P2004/64 , C01P2004/84 , C01P2006/40 , H01M2004/028
摘要： A cathode active material for a lithium secondary battery includes a lithium-aluminum-titanium oxide formed on a surface of a lithium metal oxide particle having a specific formula. The cathode active material may have an improved structural stability even in a high temperature condition.
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8.发明授权公开(公告)号：US11973179B2
公开(公告)日：2024-04-30
申请号：US17481535
申请日：2021-09-22
发明人： Sang Bok Kim , Jik Soo Kim , Jeong Bae Yoon , Seung Ok Lee , Ji Hoon Choi
IPC分类号： H01M10/0525 , H01M4/04 , H01M4/38 , H01M4/525 , H01M4/02
CPC分类号： H01M10/0525 , H01M4/0471 , H01M4/382 , H01M2004/028 , H01M4/525
摘要： A method of manufacturing a cathode active material for a lithium secondary battery according to embodiments of the present invention includes performing a first heat treatment on a first mixture of a transition metal precursor and a lithium precursor at a first calcination temperature to obtain a preliminary lithium-transition metal composite oxide particle; and performing a second heat treatment on a second mixture obtained by adding the lithium precursor to the preliminary lithium-transition metal composite oxide particle at a second calcination temperature which is lower than the first calcination temperature to form a lithium-transition metal composite oxide particle.
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公开(公告)号：US11637279B2
公开(公告)日：2023-04-25
申请号：US17512440
申请日：2021-10-27
发明人： Sang Bok Kim , Sang Hye Shin , Sang Min Park , Tae Kyoung Lee , Myoung Lae Kim , Jeong Bae Yoon , Jik Soo Kim , Ji Hoon Choi
摘要： The cathode active material for a lithium secondary battery according to embodiments of the present invention includes a lithium-transition metal composite oxide particle including a plurality of primary particles, and the lithium-transition metal composite oxide particle includes a lithium-sulfur-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by preventing the layer structure deformation of the primary particles and removing residual lithium.
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