公开(公告)号：US20230416111A1

公开(公告)日：2023-12-28

申请号：US18464921

申请日：2023-09-11

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jinhwa KIM ,  Minhan KIM ,  Donggyu CHANG ,  Jihyun SEOG ,  Yuntaek OH ,  Jungwoo SON

IPC: C01G53/00 ,  H01M4/525

CPC classification number: C01G53/42 ,  C01G53/006 ,  H01M4/525 ,  C01P2002/72 ,  C01P2002/85 ,  C01P2004/03 ,  C01P2006/12 ,  C01P2006/40 ,  C01P2004/45 ,  C01P2004/10 ,  C01P2004/04 ,  C01P2002/78 ,  H01M2004/028

Abstract: A method of preparing a positive active material involves mixing a nickel compound, a cobalt compound, and optionally a metal compound to obtain a first mixture, subjecting the first mixture to a co-precipitation reaction to obtain a first resulting product, washing with water, filtering and drying the first resulting product to prepare a transition metal hydroxide precursor, subjecting the transition metal hydroxide precursor to a primary heat treatment to prepare a transition metal composite oxide precursor, mixing the transition metal composite oxide precursor and a dehydrated lithium salt to obtain a second mixture, and performing a secondary heat treatment on the second mixture to prepare a nickel-based lithium transition metal oxide. The dehydrated lithium salt is prepared by drying a hydrated lithium salt having an average particle diameter (D50) of about 400-600 μm and then pulverizing the resultant to have a D50 of about 3-30 μm.

公开(公告)号：US20240413298A1

公开(公告)日：2024-12-12

申请号：US18737629

申请日：2024-06-07

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jungwoo SON ,  Seonyoung KWON ,  Eunok OH ,  Yuntaek OH ,  Minkyeong KANG ,  Taehee KWAK

IPC: H01M4/131 ,  H01M4/02 ,  H01M4/133 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0585

Abstract: A positive electrode for a stack-type rechargeable lithium battery includes a current collector, a first positive electrode active material layer on one surface of the current collector, and a second positive electrode active material layer on the other surface of the current collector, wherein a loading level of the first positive electrode active material layer is about 5% or more higher than a loading level of the second positive electrode active material layer, each of the first positive electrode active material layer and the second positive electrode active material layer includes a first positive electrode active material in the form of secondary particles and a second positive electrode active material in the form of single particles, an average particle diameter of secondary particles of the first positive electrode active material is larger than an average particle diameter of single particles of the second positive electrode active material.

公开(公告)号：US20240213470A1

公开(公告)日：2024-06-27

申请号：US18473966

申请日：2023-09-25

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Seonyoung KWON ,  Eunok OH ,  Jungwoo SON ,  Yuntaek OH ,  Minkyeong KANG ,  Taehee KWAK

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

CPC classification number: H01M4/525 ,  H01M4/364 ,  H01M4/505 ,  H01M10/0525 ,  H01M2004/021

Abstract: A positive electrode for a rechargeable lithium battery includes a current collector and a positive electrode active material layer on the current collector, the positive electrode active material layer including a positive electrode active material, the positive electrode active material includes about 75 wt % to about 100 wt % of a first positive electrode active material in a form of single particles and including a lithium nickel-based composite oxide having a nickel content of greater than or equal to about 70 mol %, and about 0 wt % to about 25 wt % of a second positive electrode active material in a form of secondary particles in which a plurality of primary particles are aggregated and including a lithium nickel-based composite oxide, and, in an X-ray diffraction analysis of the positive electrode, a ratio of a peak intensity of a (003) plane to a (104) plane is greater than or equal to about 4.8.