公开(公告)号：US20210043920A1

公开(公告)日：2021-02-11

申请号：US17073124

申请日：2020-10-16

Applicant: Samsung SDI Co., Ltd.

Inventor： Jongmin KIM ,  Jiyoon KIM ,  Jinhwa KIM

IPC: H01M4/131 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/505 ,  H01M4/1391 ,  H01M4/36

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：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.