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公开(公告)号:US20200251719A1
公开(公告)日:2020-08-06
申请号:US16857466
申请日:2020-04-24
Inventor: Hyunjei CHUNG , Hanseul KIM , Sung Wook DOO , Kyu Tae LEE , Jungwoo LIM , Aram CHOI
IPC: H01M4/134 , H01M4/131 , H01M4/525 , H01M4/505 , H01M4/36 , H01M4/04 , H01M10/0525 , H01M10/0569
Abstract: A composite positive electrode active material includes: a lithium transition metal oxide having an α-NaFeO2 layered crystal structure; and a coating film including a lithium metal oxide on a (003) crystal plane of the lithium transition metal oxide, a method of preparing the same, and a lithium secondary battery including a positive electrode including the composite positive electrode active material.
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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.-
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:US20250167228A1
公开(公告)日:2025-05-22
申请号:US18952931
申请日:2024-11-19
Applicant: Samsung SDI Co., Ltd.
Inventor: Seungyeon CHOI , Soohyeon KIM , Dongwook SHIN , Soonkie HONG , Aram CHOI , Jeuk HA , Minah CHA , Minhan KIM
Abstract: A positive electrode active material includes a layered lithium nickel-based composite oxide, wherein, based on 100 mol % of a total mole of metals of the layered lithium nickel-based composite oxide excluding lithium, a nickel content is greater than or equal to about 60 mol %, an aluminum content is about 0.8 mol % to about 1.5 mol %, a zirconium content is about 0.1 mol % to about 0.3 mol %, and a ratio of the aluminum content relative to the zirconium content (Al/Zr) is greater than or equal to about 5, and the positive electrode active material is in a form of a single particle with an average particle diameter (D50) of about 1 μm to about 4 μm.
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公开(公告)号:US20250149558A1
公开(公告)日:2025-05-08
申请号:US18940619
申请日:2024-11-07
Applicant: Samsung SDI Co., Ltd.
Inventor: Aram CHOI , Dongwook SHIN , Soonkie HONG , Seungyeon CHOI , Minah CHA , Soohyeon KIM , Jeuk HA , Minhan KIM
IPC: H01M4/36 , C01G53/00 , H01M4/02 , H01M4/525 , H01M10/052
Abstract: A positive electrode active material, a preparation method thereof, and a positive electrode including the same, and a rechargeable lithium battery are provided. The positive electrode active material including particles having a core of a lithium nickel-based composite oxide, and a nickel reduction layer arranged on the surface of the core and containing nickel with an oxidation number of less than about 3+. The nickel reduction layer has a thickness of less than, or equal to, about 10 nanometer from a surface of the particle to a center of the particle.
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