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：US20250167228A1

公开(公告)日：2025-05-22

申请号：US18952931

申请日：2024-11-19

Applicant: Samsung SDI Co., Ltd.

Inventor： Seungyeon CHOI ,  Soohyeon KIM ,  Dongwook SHIN ,  Soonkie HONG ,  Aram CHOI ,  Jeuk HA ,  Minah CHA ,  Minhan KIM

IPC: H01M4/525 ,  C01G53/00 ,  C01G53/04 ,  H01M4/02 ,  H01M4/36 ,  H01M10/052

Abstract: A positive electrode active material includes a layered lithium nickel-based composite oxide, wherein, based on 100 mol % of a total mole of metals of the layered lithium nickel-based composite oxide excluding lithium, a nickel content is greater than or equal to about 60 mol %, an aluminum content is about 0.8 mol % to about 1.5 mol %, a zirconium content is about 0.1 mol % to about 0.3 mol %, and a ratio of the aluminum content relative to the zirconium content (Al/Zr) is greater than or equal to about 5, and the positive electrode active material is in a form of a single particle with an average particle diameter (D50) of about 1 μm to about 4 μm.

公开(公告)号：US20250149558A1

公开(公告)日：2025-05-08

申请号：US18940619

申请日：2024-11-07

Applicant: Samsung SDI Co., Ltd.

Inventor： Aram CHOI ,  Dongwook SHIN ,  Soonkie HONG ,  Seungyeon CHOI ,  Minah CHA ,  Soohyeon KIM ,  Jeuk HA ,  Minhan KIM

IPC: H01M4/36 ,  C01G53/00 ,  H01M4/02 ,  H01M4/525 ,  H01M10/052

Abstract: A positive electrode active material, a preparation method thereof, and a positive electrode including the same, and a rechargeable lithium battery are provided. The positive electrode active material including particles having a core of a lithium nickel-based composite oxide, and a nickel reduction layer arranged on the surface of the core and containing nickel with an oxidation number of less than about 3+. The nickel reduction layer has a thickness of less than, or equal to, about 10 nanometer from a surface of the particle to a center of the particle.

公开(公告)号：US20240213465A1

公开(公告)日：2024-06-27

申请号：US18366545

申请日：2023-08-07

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jinhwa KIM ,  Minhan KIM ,  Jihyun SEOG ,  Youngjoo CHAE ,  Soonrewl LEE ,  Wooyoung YANG ,  Ickkyu CHOI ,  Jongmin KIM ,  Jongsan IM

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/02 ,  H01M4/36 ,  H01M4/505 ,  H01M4/88 ,  H01M10/0525 ,  H01M10/44

CPC classification number: H01M4/525 ,  C01G53/50 ,  H01M4/362 ,  H01M4/505 ,  H01M4/8882 ,  H01M10/0525 ,  H01M10/44 ,  C01P2006/40 ,  H01M2004/028 ,  H01M2220/00

Abstract: Disclosed are a positive active material for a rechargeable lithium battery, and a rechargeable lithium battery including the same. The positive active material for a rechargeable lithium battery includes a first positive active material including a secondary particle including lithium nickel-based composite oxide wherein in the secondary particle, a plurality of primary particles are aggregated and zirconium on the surface of the secondary particle, and a second positive active material including a single particle including lithium nickel-based composite oxide and zirconium on the surface of the single particle, wherein a ratio of a Zr content (at %) relative to all elements on the surface of the single particle of the second positive active material to a Zr content (at %) to all elements on the surface of the secondary particle of the first positive active material is about 1.5 to about 3.0.

公开(公告)号：US20250140792A1

公开(公告)日：2025-05-01

申请号：US18927405

申请日：2024-10-25

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jinhwa KIM ,  Minhan KIM ,  Soonrewl LEE ,  Jihyun SEOG

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/04 ,  H01M4/131 ,  H01M4/525 ,  H01M4/62

Abstract: A rechargeable lithium battery including a positive electrode, and the positive electrode includes a positive electrode current collector, and a positive electrode active material layer on the positive electrode current collector, wherein the positive electrode active material layer includes a first positive electrode active material and a second positive electrode active material, the first positive electrode active material includes lithium nickel-based composite oxide and includes secondary particles composed of a plurality of primary particles, and an average particle diameter (D50) of the secondary particles is about 9 μm to about 25 μm, the second positive electrode active material includes lithium nickel-based composite oxide and comprises single particles, and an average particle diameter (D50) of the single particles is about 0.5 μm to about 5 μm.

公开(公告)号：US20240222602A1

公开(公告)日：2024-07-04

申请号：US18603865

申请日：2024-03-13

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jungsue JANG ,  Donghyun KIL ,  Minhan KIM ,  Jinyoung KIM ,  Jinhwa KIM ,  Jihyun SEOG ,  Jaeha SHIM ,  Kiyong AHN ,  Donggyu CHANG ,  Youngjoo CHAE ,  Aram CHOI ,  Jeuk HA

IPC: H01M4/36 ,  C01G53/00 ,  H01M4/02 ,  H01M4/04 ,  H01M4/505 ,  H01M4/525

CPC classification number: H01M4/364 ,  C01G53/40 ,  C01G53/44 ,  H01M4/0471 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M2004/021 ,  H01M2004/028

Abstract: Disclosed are a positive active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same. The positive active material includes a first positive active material in a form of secondary particles including a plurality of primary particles that are aggregated together, and a second positive active material having a single particle form, wherein both of the first positive active material and the second positive active material are nickel-based positive active materials, each of the first positive active material and the second positive active material is coated with cobalt, and a maximum roughness of a surface of the second positive active material is greater than or equal to about 15 nm.

公开(公告)号：US20240204186A1

公开(公告)日：2024-06-20

申请号：US18480408

申请日：2023-10-03

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jinhwa KIM ,  Minhan KIM ,  Jihyun SEOG ,  Youngjoo CHAE

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

CPC classification number: H01M4/525 ,  H01M4/366 ,  H01M10/0525 ,  H01M2004/028

Abstract: A positive active material includes a first positive active material in a secondary particle form in which a plurality of primary particles are aggregated, and a second positive active material in a single particle form, wherein each of the first positive active material and the second positive active material includes a lithium nickel-based composite oxide having a nickel content of greater than or equal to about 70 mol % relative to the total elements excluding lithium and excluding oxygen, the first positive active material includes a coating portion in a form of a film on the surface of the secondary particle, the second positive active material includes a coating portion in a form of a film on the surface of the single particle, the coating portion of the first positive active material and the coating portion of the second positive active material includes lithium cobalt oxide and cobalt oxyhydroxide, respectively.

公开(公告)号：US20240178373A1

公开(公告)日：2024-05-30

申请号：US18354414

申请日：2023-07-18

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Youngjoo CHAE ,  Minhan KIM ,  Jinhwa KIM ,  Jihyun SEOG

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/525 ,  H01M10/052

CPC classification number: H01M4/366 ,  H01M4/0471 ,  H01M4/525 ,  H01M10/052 ,  H01M2004/028

Abstract: Disclosed are a positive active material for a rechargeable lithium battery, a preparation method thereof, and a rechargeable lithium battery including the same. The positive active material for a rechargeable lithium battery includes a first positive active material including a lithium nickel-based composite oxide and including a secondary particle in which a plurality of primary particles are aggregated and a cobalt coating portion on a surface of the secondary particle, and a second positive active material including a lithium nickel-based composite oxide and including a single particle and a cobalt coating portion on a surface of the single particle, wherein a cobalt content (at %) based on the total amount of nickel and cobalt in the cobalt coating portion of the first positive active material is about 1.45 times to about 1.60 times a cobalt content (at %).

公开(公告)号：US20220384780A1

公开(公告)日：2022-12-01

申请号：US17657316

申请日：2022-03-30

Applicant: Samsung SDI Co., Ltd.

Inventor： Jungsue JANG ,  Donghyun KIL ,  Minhan KIM ,  Jinyoung KIM ,  Jinhwa KIM ,  Jihyun SEOG ,  Jaeha SHIM ,  Kiyong AHN ,  Donggyu CHANG ,  Youngjoo CHAE ,  Aram CHOI ,  Jeuk HA

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/04 ,  C01G53/00

Abstract: Disclosed are a positive active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same.
The positive active material includes a first positive active material in a form of secondary particles including a plurality of primary particles that are aggregated together, and a second positive active material having a single crystal form, wherein both of the first positive active material and the second positive active material are nickel-based positive active materials, each of the first positive active material and the second positive active material is coated with cobalt, and a maximum roughness of a surface of the second positive active material is greater than or equal to about 15 nm.

公开(公告)号：US20190181445A1

公开(公告)日：2019-06-13

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: H01M4/525 ,  C01G53/00 ,  H01M10/0525

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]