公开(公告)号：US10826064B2

公开(公告)日：2020-11-03

申请号：US16327244

申请日：2017-09-04

Applicant: Samsung SDI Co., Ltd.

Inventor： Daehoe Lee ,  Dongjin Kim ,  Minhan Kim ,  Ilseok Kim ,  Dohyung Park ,  Junseok Park ,  Okgyu Lim ,  Gyuran Jeon ,  Jeonjin Choi

IPC: H01M4/00 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/131 ,  C01G53/00 ,  H01M4/02

Abstract: The present disclosure relates to a cathode active material for a lithium secondary battery, a method for preparing same, and a lithium secondary battery comprising same, the cathode active material comprising a lithium-nickel compound oxide, wherein a c-axis lattice parameter of a unit lattice of the lithium-nickel compound oxide satisfies Formula 1: 14.1720 ÅA≤c≤14.1750 ÅA  [Formula 1]

公开(公告)号：US20190027739A1

公开(公告)日：2019-01-24

申请号：US16044399

申请日：2018-07-24

Applicant: Samsung SDI Co., Ltd.

Inventor： Minhan Kim ,  Dongjin Kim ,  Ilseok Kim ,  Dohyung Park ,  Junseok Park ,  Daehoe Lee ,  Okgyu Lim ,  Gyuran Jeon ,  Jeonjin Choi

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

Abstract: A positive active material for a rechargeable lithium battery includes a core including a compound represented by Chemical Formula 1 and a functional layer on a surface of the core. The functional layer has one kind of a crystal structure that is different from the crystal structure of the core. The positive active material includes about 100 ppm to about 400 ppm of sulfur: LiaNixCoyMezO2,  Chemical Formula 1 wherein in Chemical Formula 1, 0.9≤a≤1.1, 0.5≤x≤0.93, 0