公开(公告)号：US20200251719A1

公开(公告)日：2020-08-06

申请号：US16857466

申请日：2020-04-24

Applicant: Samsung SDI Co., Ltd. ,  Seoul National University R&DB Foundation

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.

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：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

IPC: H01M4/525 ,  C01G53/00 ,  C01G53/04 ,  H01M4/02 ,  H01M4/36 ,  H01M10/052

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.

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.