公开(公告)号：US20240387803A1

公开(公告)日：2024-11-21

申请号：US18786179

申请日：2024-07-26

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Donggyu CHANG ,  Jongmin KIM

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

Abstract: Provided are a cathode active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery including a cathode including the cathode active material. The cathode active material includes: a secondary particle of a nickel-based active material, wherein the secondary particle including a plurality of primary particles, wherein the secondary particle includes a radial arrangement structure and an irregular porous structure, the radial arrangement structure is located closer to a surface of the secondary particle than the irregular porous structure, and a lithium fluoride-based compound is present on a surface of the nickel-based active material.

公开(公告)号：US20240213465A1

公开(公告)日：2024-06-27

申请号：US18366545

申请日：2023-08-07

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jinhwa KIM ,  Minhan KIM ,  Jihyun SEOG ,  Youngjoo CHAE ,  Soonrewl LEE ,  Wooyoung YANG ,  Ickkyu CHOI ,  Jongmin KIM ,  Jongsan IM

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/02 ,  H01M4/36 ,  H01M4/505 ,  H01M4/88 ,  H01M10/0525 ,  H01M10/44

CPC classification number: H01M4/525 ,  C01G53/50 ,  H01M4/362 ,  H01M4/505 ,  H01M4/8882 ,  H01M10/0525 ,  H01M10/44 ,  C01P2006/40 ,  H01M2004/028 ,  H01M2220/00

Abstract: Disclosed are a positive active material for a rechargeable lithium battery, and a rechargeable lithium battery including the same. The positive active material for a rechargeable lithium battery includes a first positive active material including a secondary particle including lithium nickel-based composite oxide wherein in the secondary particle, a plurality of primary particles are aggregated and zirconium on the surface of the secondary particle, and a second positive active material including a single particle including lithium nickel-based composite oxide and zirconium on the surface of the single particle, wherein a ratio of a Zr content (at %) relative to all elements on the surface of the single particle of the second positive active material to a Zr content (at %) to all elements on the surface of the secondary particle of the first positive active material is about 1.5 to about 3.0.

公开(公告)号：US20230098411A1

公开(公告)日：2023-03-30

申请号：US17936544

申请日：2022-09-29

Applicant: Samsung SDI Co., Ltd.

Inventor： Pilsang YUN ,  Jongmin KIM ,  Hyunbeom KIM ,  Sangin PARK ,  Hanseul LEE

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/58 ,  H01M4/04

Abstract: Provided are a positive electrode active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same, the positive electrode active material for a rechargeable lithium battery including a secondary particle in which a plurality of primary particles including a lithium nickel-based composite oxide are aggregated, wherein at least a portion of the primary particles are arranged radially, a boron coating layer on the surface of the secondary particles and containing lithium borate, and a boron-doped layer inside the primary particle exposed to the surface of the secondary particle.

公开(公告)号：US20210399299A1

公开(公告)日：2021-12-23

申请号：US17348019

申请日：2021-06-15

Applicant: Samsung SDI Co., Ltd.

Inventor： Youngjoo CHAE ,  Youngki KIM ,  Jongmin KIM ,  Soonrewl LEE ,  Soonkie HONG

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/04 ,  H01M10/0525

Abstract: A nickel-based composite positive electrode active material for a lithium secondary battery is in the form of secondary particles each comprised of a plurality of primary particles, each primary particle of the plurality of primary particles having a core portion formed of a nickel-based lithium metal oxide having a layered phase and a surface portion positioned on the core portion, wherein the surface portion has a spinel phase and the layered phase. A method of preparing the nickel-based composite positive electrode active material, and a lithium secondary battery containing a positive electrode including the nickel-based composite positive electrode active material are also provided.

公开(公告)号：US20210265628A1

公开(公告)日：2021-08-26

申请号：US17308940

申请日：2021-05-05

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jongmin KIM ,  Jiyoon KIM ,  Pilsang YUN ,  Donggyu CHANG ,  Kwanghwan CHO ,  Jangsuk HYUN ,  Jinhwa KIM

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/485 ,  H01M4/505

Abstract: Provided are a nickel-based active material, a method of preparing the same, and a lithium secondary battery including a positive electrode including the nickel-based active material. The nickel-based active material includes at least one secondary particle including an aggregate of two or more primary particles, wherein at least a portion of the secondary particle has a radial array structure, and a hetero-element compound is positioned between the primary particles.

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

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

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：US20190173076A1

公开(公告)日：2019-06-06

申请号：US16209659

申请日：2018-12-04

Applicant: Samsung SDI Co., Ltd.

Inventor： Jongmin KIM ,  Jiyoon KIM ,  Jinhwa KIM

IPC: H01M4/131 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/1391 ,  H01M4/04 ,  H01M4/505

Abstract: A positive active material for a rechargeable lithium battery includes a first positive active material including a secondary particle including at least two agglomerated primary particles, where at least one part of the primary particles has a radial arrangement structure, as well as a second positive active material having a monolith structure. The first and second positive active materials may both include nickel-based positive active materials. A method of preparing the positive active material, and a rechargeable lithium battery including a positive electrode including the positive active material are also provided.

公开(公告)号：US20180026268A1

公开(公告)日：2018-01-25

申请号：US15654648

申请日：2017-07-19

Applicant: Samsung SDI Co., Ltd.

Inventor： Jongmin KIM ,  Jiyoon KIM ,  Pilsang YUN ,  Donggyu CHANG ,  Kwanghwan CHO ,  Jangsuk HYUN ,  Jinhwa KIM

IPC: H01M4/525 ,  H01M4/485 ,  H01M10/052

Abstract: Provided are a nickel-based active material, a method of preparing the same, and a lithium secondary battery including a positive electrode including the nickel-based active material. The nickel-based active material includes at least one secondary particle including an aggregate of two or more primary particles, wherein at least a portion of the secondary particle has a radial array structure, and a hetero-element compound is positioned between the primary particles.