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.