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公开(公告)号：US20220384780A1
公开(公告)日：2022-12-01
申请号：US17657316
申请日：2022-03-30
Applicant: Samsung SDI Co., Ltd.
Inventor： Jungsue JANG , Donghyun KIL , Minhan KIM , Jinyoung KIM , Jinhwa KIM , Jihyun SEOG , Jaeha SHIM , Kiyong AHN , Donggyu CHANG , Youngjoo CHAE , Aram CHOI , Jeuk HA
Abstract: Disclosed are a positive active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same.
The positive active material includes a first positive active material in a form of secondary particles including a plurality of primary particles that are aggregated together, and a second positive active material having a single crystal form, wherein both of the first positive active material and the second positive active material are nickel-based positive active materials, each of the first positive active material and the second positive active material is coated with cobalt, and a maximum roughness of a surface of the second positive active material is greater than or equal to about 15 nm.-
Patent Agency Ranking
公开(公告)号：US20240222602A1
公开(公告)日：2024-07-04
申请号：US18603865
申请日：2024-03-13
Applicant: SAMSUNG SDI CO., LTD.
Inventor： Jungsue JANG , Donghyun KIL , Minhan KIM , Jinyoung KIM , Jinhwa KIM , Jihyun SEOG , Jaeha SHIM , Kiyong AHN , Donggyu CHANG , Youngjoo CHAE , Aram CHOI , Jeuk HA
CPC classification number: H01M4/364 , C01G53/40 , C01G53/44 , H01M4/0471 , H01M4/366 , H01M4/505 , H01M4/525 , H01M2004/021 , H01M2004/028
Abstract: Disclosed are a positive active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same. The positive active material includes a first positive active material in a form of secondary particles including a plurality of primary particles that are aggregated together, and a second positive active material having a single particle form, wherein both of the first positive active material and the second positive active material are nickel-based positive active materials, each of the first positive active material and the second positive active material is coated with cobalt, and a maximum roughness of a surface of the second positive active material is greater than or equal to about 15 nm.
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公开(公告)号：US20200251724A1
公开(公告)日：2020-08-06
申请号：US16777744
申请日：2020-01-30
Applicant: Samsung SDI Co., Ltd.
Inventor： Sungsoo KIM , Donghyun KIL
IPC: H01M4/36 , H01M10/0525 , H01M4/525 , H01M4/505 , H01M4/62
Abstract: A positive active material for a rechargeable lithium battery includes a lithium nickel-based composite oxide and a lithium manganese composite oxide, wherein the positive active material includes a surface-modifying layer including lithium fluoride on the surface of at least one of the lithium nickel-based composite oxide and the lithium manganese composite oxide. The lithium nickel-based composite oxide includes a secondary particle in which a plurality of plate-shaped primary particles are agglomerated, and the secondary particle has a regular array structure in which (003) planes of the plurality of primary particles are aligned or oriented normal to the surface of the secondary particle. The lithium manganese composite oxide is present in two or more types of crystal lattice structures.
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公开(公告)号：US20200161643A1
公开(公告)日：2020-05-21
申请号：US16684057
申请日：2019-11-14
Applicant: Samsung SDI Co., Ltd.
Inventor： Donggyu CHANG , Donghyun KIL , Jongmin KIM , Wooyoung YANG
Abstract: A positive active material for a rechargeable lithium battery includes a lithium nickel-based composite oxide including a secondary particle in which a plurality of plate-shaped primary particles are agglomerated; and a coating layer including a fiber-shaped lithium manganese composite oxide, wherein the fiber-shaped lithium manganese composite oxide is attached to the surface of the lithium nickel-based composite oxide.
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公开(公告)号：US20240304790A1
公开(公告)日：2024-09-12
申请号：US18668001
申请日：2024-05-17
Applicant: Samsung SDI Co., Ltd.
Inventor： Sungsoo KIM , Donghyun KIL
CPC classification number: H01M4/364 , H01M4/366 , H01M4/505 , H01M4/525 , H01M4/62 , H01M10/0525 , H01M2004/021 , H01M2004/028
Abstract: A positive active material for a rechargeable lithium battery includes a lithium nickel-based composite oxide and a lithium manganese composite oxide, wherein the positive active material includes a surface-modifying layer including lithium fluoride on the surface of at least one of the lithium nickel-based composite oxide and the lithium manganese composite oxide. The lithium nickel-based composite oxide includes a secondary particle in which a plurality of plate-shaped primary particles are agglomerated, and the secondary particle has a regular array structure in which (003) planes of the plurality of primary particles are aligned or oriented normal to the surface of the secondary particle. The lithium manganese composite oxide is present in two or more types of crystal lattice structures, wherein the positive active material comprises 1,000 ppm or less of unreacted residual lithium at the surface thereof.
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公开(公告)号：US20200152981A1
公开(公告)日：2020-05-14
申请号：US16682907
申请日：2019-11-13
Applicant: Samsung SDI Co., Ltd.
Inventor： Jongmin KIM , Donghyun KIL , Wooyoung YANG , Seung Joon LEE
IPC: H01M4/525 , H01M4/505 , H01M10/0525
Abstract: A positive active material for a rechargeable lithium battery includes a lithium nickel-based composite oxide including a secondary particle in which a plurality of plate-shaped primary particles are agglomerated; and a lithium manganese composite oxide having at least two crystal lattice structures, wherein the secondary particle has a regular array structure in which (003) planes of the primary particles are oriented in a vertical direction with respect to the surface of the secondary particle.
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