公开(公告)号：US20180151865A1

公开(公告)日：2018-05-31

申请号：US15824829

申请日：2017-11-28

Applicant: Samsung SDI Co., Ltd.

Inventor： Yumi SONG ,  Seonyoung KWON ,  Kihyun KIM ,  Soohyeon KIM ,  Jinhwa KIM ,  Joongho MOON ,  Jaeho LEE ,  Kwanghwan CHO ,  Soonbong CHOI ,  Mingzi HONG

IPC: H01M4/131 ,  H01M4/133 ,  H01M4/66 ,  H01M10/0525

CPC classification number: H01M4/131 ,  C01B32/22 ,  H01M4/133 ,  H01M4/366 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/665 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028 ,  Y02T10/7011

Abstract: A composite cathode active material, a cathode including the composite cathode active material, and a lithium battery including the cathode are provided. The composite cathode active material includes a core including a lithium metal oxide and a coating layer on the core, wherein the lithium metal oxide includes two or more transition metals including nickel (Ni), an amount of Ni within one mole of the two or more transition metals included in the lithium metal oxide is about 0.65 mol or greater, the coating layer includes LiF, and a resistance of the composite cathode active material is lower than that of the core.

公开(公告)号：US20220388865A1

公开(公告)日：2022-12-08

申请号：US17804999

申请日：2022-06-01

Applicant: Samsung SDI Co., Ltd.

Inventor： Soohyeon KIM ,  Sungsoo KIM ,  Jangwook LEE ,  Seungyeon CHOI

IPC: C01G53/00 ,  H01M10/0525 ,  C01F17/32

Abstract: A composite cathode active material, a method of preparing the composite cathode active material, and a lithium secondary battery including a cathode including the composite cathode active material are provided. The composite cathode active material includes: a nickel-based active material including about 60 mol % or more of nickel; and a coating layer on a surface of the nickel-based active material, the coating layer including a lanthanide composite. The composite cathode active material includes or is in the form of single crystal particles having an average particle diameter in a range of about 2 μm to about 8 μm.

公开(公告)号：US20200058925A1

公开(公告)日：2020-02-20

申请号：US16663105

申请日：2019-10-24

Applicant: Samsung SDI Co., Ltd.

Inventor： Yumi SONG ,  Seonyoung KWON ,  Kihyun KIM ,  Soohyeon KIM ,  Jinhwa KIM ,  Joongho MOON ,  Jaeho LEE ,  Kwanghwan CHO ,  Soonbong CHOI ,  Mingzi HONG

IPC: H01M4/131 ,  H01M4/66 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/485 ,  H01M4/505 ,  H01M4/36 ,  H01M10/052 ,  H01M4/525

Abstract: A composite cathode active material, a cathode including the composite cathode active material, and a lithium battery including the cathode are provided. The composite cathode active material includes a core including a lithium metal oxide and a coating layer on the core, wherein the lithium metal oxide includes two or more transition metals including nickel (Ni), an amount of Ni within one mole of the two or more transition metals included in the lithium metal oxide is about 0.65 mol or greater, the coating layer includes LiF, and a resistance of the composite cathode active material is lower than that of the core.

公开(公告)号：US20210305550A1

公开(公告)日：2021-09-30

申请号：US17250665

申请日：2019-06-14

Applicant: Samsung SDI Co., Ltd.

Inventor： Soohyeon KIM ,  Jongmin KIM

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

Abstract: Provided is a positive active material for a rechargeable lithium battery including a nickel-based composite oxide having a nickel content of greater than or equal to 60 mol % relative to a total amount of metal excluding lithium and a coating layer on the surface of the nickel-based composite oxide, wherein the coating layer includes lithium fluoride (LiF) and metal fluoride produced by firing a metal oxide and a fluorine-based organic material.

公开(公告)号：US20200350582A1

公开(公告)日：2020-11-05

申请号：US16962635

申请日：2019-01-29

Applicant: Samsung SDI Co., Ltd.

Inventor： Jongmin KIM ,  Soohyeon KIM ,  Jinhwa KIM ,  Pilsang YUN

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

Abstract: Disclosed are a cathode active material for a lithium secondary battery and a lithium secondary battery including the same. The cathode active material includes a secondary particle in which a plurality of primary particles are agglomerated, wherein the secondary particle has a predetermined arrangement structure in which (003) surface of primary particles are aligned to be in a vertical direction with respect to a tangent line at a point (P) at which the (003) surface of the primary particles meet a surface of the secondary particle.

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.

公开(公告)号：US20250140813A1

公开(公告)日：2025-05-01

申请号：US19003965

申请日：2024-12-27

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Soohyeon KIM ,  Jongmin KIM

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/04 ,  H01M4/136 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

Abstract: Provided is a positive active material for a rechargeable lithium battery including a nickel-based composite oxide having a nickel content of greater than or equal to 60 mol % relative to a total amount of metal excluding lithium and a coating layer on the surface of the nickel-based composite oxide, wherein the coating layer includes lithium fluoride (LiF) and metal fluoride produced by firing a metal oxide and a fluorine-based organic material.