公开(公告)号：US20210135215A1

公开(公告)日：2021-05-06

申请号：US17084466

申请日：2020-10-29

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Donghyun Kil

IPC: H01M4/525 ,  H01M4/58 ,  H01M4/36 ,  H01M10/0525 ,  C01G53/00

Abstract: This application relates to a positive active material for a rechargeable lithium battery including a lithium nickel-based composite oxide including a large-diameter particle and a small-diameter particle having different average particle diameters. The large-diameter particle includes secondary particles including a plurality of primary particles and the small-diameter particle includes lithium halide. The large-diameter particle has an average particle diameter (D50) of about 10 μm to about 20 μm, and the small-diameter particle has an average particle diameter (D50) of about 1 μm to about 8 μm. This application also relates to a method of preparing the positive active material, and a rechargeable lithium battery including the positive active material.

公开(公告)号：US12034149B2

公开(公告)日：2024-07-09

申请号：US16777744

申请日：2020-01-30

Applicant: Samsung SDI Co., Ltd.

Inventor： Sungsoo Kim ,  Donghyun Kil

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525

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.

公开(公告)号：US11757092B2

公开(公告)日：2023-09-12

申请号：US16684057

申请日：2019-11-14

Applicant: Samsung SDI Co., Ltd.

Inventor： Donggyu Chang ,  Donghyun Kil ,  Jongmin Kim ,  Wooyoung Yang

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/50 ,  H01M4/505 ,  H01M4/52 ,  H01M4/525 ,  H01M10/04 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/366 ,  H01M4/0471 ,  H01M4/502 ,  H01M4/505 ,  H01M4/523 ,  H01M4/525 ,  H01M10/0422 ,  H01M10/0525 ,  H01M2004/028

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.

公开(公告)号：US11495796B2

公开(公告)日：2022-11-08

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 ,  H01M4/02

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.

公开(公告)号：US12300807B2

公开(公告)日：2025-05-13

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 ,  C01G53/40 ,  C01G53/44 ,  H01M4/04 ,  H01M4/505 ,  H01M4/525 ,  H01M4/02

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.