公开(公告)号：US20240076200A1

公开(公告)日：2024-03-07

申请号：US18215713

申请日：2023-06-28

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jungsue JANG ,  Donggyu CHANG ,  Jinyoung KIM ,  Jaeha SHIM ,  Taegeun KANG

IPC: C01G53/00

CPC classification number: C01G53/42 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2006/40 ,  C01P2006/80

Abstract: A positive active material includes a first positive active material including a lithium nickel-based composite oxide and including secondary particles in which a plurality of primary particles are aggregated, and a cobalt coating portion on a surface of the secondary particles; and a second positive active material including a lithium nickel-based composite oxide and including single particles and a cobalt coating portion on a surface of the single particles, wherein the surface of the single particles includes a high-concentration coating region having a cobalt content of greater than or equal to about 30 at % and a low-concentration coating region having a cobalt content of less than or equal to about 25 at % based on the total amount of nickel and cobalt, and a difference between the cobalt content in the high-concentration coating region and a cobalt content in the low-concentration coating region is about 20 at % to about 50 at %.

公开(公告)号：US20240166531A1

公开(公告)日：2024-05-23

申请号：US18229112

申请日：2023-08-01

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jungsue JANG ,  Jinyoung KIM ,  Donggyu CHANG ,  Jaeha SHIM ,  Taegeun KANG

IPC: C01G53/00 ,  H01M10/052

CPC classification number: C01G53/42 ,  H01M10/052 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/40

Abstract: A positive active material for a rechargeable lithium battery, a preparation method thereof, and a rechargeable lithium battery including the same are disclosed herein. The positive active material includes a first positive active material including a first lithium nickel-based composite oxide in a form of a secondary particle in which a plurality of primary particles are aggregated and including a boron coating portion on a surface of the secondary particle, and a second positive active material including a second lithium nickel-based composite oxide in a form of a single particle and including a boron coating portion on a surface of the single particle, wherein the second positive active material has an uneven surface with substantial irregularities and a flat surface without substantial irregularities.

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

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/04 ,  C01G53/00

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

IPC: H01M4/36 ,  C01G53/00 ,  H01M4/02 ,  H01M4/04 ,  H01M4/505 ,  H01M4/525

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.

公开(公告)号：US20220140317A1

公开(公告)日：2022-05-05

申请号：US17514431

申请日：2021-10-29

Applicant: Samsung SDI Co., Ltd.

Inventor： Jungsue JANG ,  Jayhyok SONG ,  Dongwook SHIN ,  Jaeha SHIM

IPC: H01M4/36 ,  H01M4/525 ,  C01G53/00 ,  H01M4/505 ,  H01M4/02 ,  H01M10/0525

Abstract: A nickel-based lithium metal composite oxide including secondary particles including aggregates of primary particles. The secondary particles include i) large secondary particles having a particle size of at least about 14 μm and including aluminum and ii) small secondary particles having a particle size of no more than about 5 μm and including manganese, and a manganese content by mole percent of each of the large secondary particles is smaller than a manganese content by mole percent of each of the small secondary particles and manganese is included on a surface of each of the large secondary particles and aluminum is included on a surface of each of the small secondary particles.