公开(公告)号：US20200251724A1

公开(公告)日：2020-08-06

申请号：US16777744

申请日：2020-01-30

Applicant: Samsung SDI Co., Ltd.

Inventor： Sungsoo KIM ,  Donghyun KIL

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

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：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：US20240304790A1

公开(公告)日：2024-09-12

申请号：US18668001

申请日：2024-05-17

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, wherein the positive active material comprises 1,000 ppm or less of unreacted residual lithium at the surface thereof.