公开(公告)号：US20200058937A1

公开(公告)日：2020-02-20

申请号：US16539768

申请日：2019-08-13

Applicant: Samsung SDI Co., Ltd.

Inventor： Doyu KIM ,  Wooyoung YANG

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

Abstract: Provided is a nickel-based active material precursor for a lithium secondary battery, including: a secondary particle including a plurality of particulate structures, wherein each of the particulate structures includes a porous core portion and a shell portion including primary particles radially arranged on the porous core portion, and in 50% or more of the primary particles constituting a surface of the secondary particle, a major axis of each of the primary particles is aligned along a normal direction of the surface of the secondary particle. When the nickel-based active material precursor for a lithium secondary battery is used, it is possible to obtain a nickel-based active material which intercalates and deintercalates lithium and has a short diffusion distance of lithium ions.

公开(公告)号：US20210202941A1

公开(公告)日：2021-07-01

申请号：US17183295

申请日：2021-02-23

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Doyu KIM ,  Donggyu CHANG ,  Jongmin KIM

IPC: H01M4/525 ,  H01M4/58 ,  H01M4/505 ,  H01M4/36 ,  H01M10/0525 ,  C01G53/04 ,  C01G53/00

Abstract: A nickel (Ni)-based active material for a lithium secondary battery, a preparing method thereof, and a lithium secondary battery including a positive electrode including the same. The Ni-based active material includes a secondary particle including a plurality of particulate structures, wherein each of the particulate structures includes a porous core portion and a shell portion including primary particles radially arranged on the porous core portion, and lithium phosphate is in the porous core portion, between the plurality of primary particles, and on the surface of the secondary particle. The Ni-based active material includes a porous inner portion including the porous core portion; and an outer portion comprising the the shell portion, and the Ni-based active material includes the porous inner portion having closed pores and the outer portion, wherein the porous inner portion has a density less than that of the outer portion, and the Ni-based active material has a net density of 4.7 g/cc or less.

公开(公告)号：US20220140331A1

公开(公告)日：2022-05-05

申请号：US17170364

申请日：2021-02-08

Applicant: Samsung SDI Co., Ltd.

Inventor： Doyu KIM

IPC: H01M4/525 ,  H01M4/134 ,  H01M4/131 ,  H01M4/505 ,  H01M4/58 ,  H01M4/36 ,  H01M4/1395 ,  H01M4/1391 ,  H01M10/0525 ,  C01G53/00

Abstract: A nickel (Ni)-based active material precursor for a lithium secondary battery, a preparing method thereof, a Ni-based active material obtained therefrom, and a lithium secondary battery including a positive electrode including the same, are provided. The Ni-based active material precursor includes a secondary particle including a plurality of particulate structures, wherein each of the particulate structures includes a porous core portion; and a shell portion including primary particles radially arranged on the porous core portion. Phosphorus (P) may be present in the porous core portion, between the plurality of primary particles, and on the surface of the secondary particle, and the content of the phosphorus may be in a range of 0.01 wt % to 2 wt % based on a total weight of the Ni-based active material precursor.