公开(公告)号：US20250096332A1

公开(公告)日：2025-03-20

申请号：US18729254

申请日：2023-02-20

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Dongwan SEO ,  Jinyoung KIM ,  Hyeonseon CHOI

IPC: H01M10/42 ,  H01M10/052 ,  H01M50/417 ,  H01M50/42 ,  H01M50/426 ,  H01M50/434 ,  H01M50/446 ,  H01M50/449 ,  H01M50/489

Abstract: Examples of the disclosure include a separator for a lithium secondary battery, and a lithium secondary battery including the separator. The separator for a lithium secondary battery includes a porous substrate; and a coating layer which is located on at least one side of the porous substrate and that includes polyethylene particles and ceramics, wherein the ceramics have an aspect ratio of 1.5-3.0.

公开(公告)号：US20250079632A1

公开(公告)日：2025-03-06

申请号：US18844186

申请日：2023-02-20

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jinyoung KIM ,  Hyeonseon CHOI ,  Dongwan SEO

IPC: H01M50/446 ,  H01M10/052 ,  H01M50/417 ,  H01M50/434 ,  H01M50/443 ,  H01M50/491

Abstract: Provided are a separator for a lithium secondary battery and a lithium secondary battery comprising same. The separator for a lithium secondary battery includes a porous substrate and a coating layer positioned on at least one surface of the porous substrate and including polyethylene particles, inorganic particles, and a binding binder, wherein the inorganic particles are a mixture of first inorganic particles and second inorganic particles, the second inorganic particles are plate-shaped Mg(OH)2, the mixing ratio of the polyethylene particles and the inorganic particles is 5:5 to 8:2 by weight, and the mixing ratio of the first inorganic particles and the second inorganic particles is 1:9 to 3:7 by weight.

公开(公告)号：US20210408528A1

公开(公告)日：2021-12-30

申请号：US17359143

申请日：2021-06-25

Applicant: Samsung SDI Co., Ltd.

Inventor： Youngjoo CHAE ,  Gwiwoon KANG ,  Youngsun KONG ,  Sangmi KIM ,  Youngki KIM ,  Jinyoung KIM ,  Jaeyoung JEONG ,  Soonkie HONG

IPC: H01M4/36 ,  H01M4/525 ,  H01M10/0525 ,  C01G53/00

Abstract: Disclosed herein are a nickel-based lithium metal composite oxide, a method of preparing the same, and a lithium secondary battery including a positive electrode including the same. The nickel-based lithium metal composite oxide includes secondary particles including aggregates of primary particles, wherein a content of nickel in the nickel-based lithium metal composite oxide is 50 mol % or more, based on the total content of transition metals in the nickel-based lithium metal composite oxide, the secondary particles include large secondary particles having a particle size of 10 μm or more and small secondary particles having a particle size of 5 μm or less, and the content of nickel in the large secondary particles is larger than the content of nickel in the small secondary particles.

公开(公告)号：US20240076200A1

公开(公告)日：2024-03-07

申请号：US18215713

申请日：2023-06-28

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jungsue JANG ,  Donggyu CHANG ,  Jinyoung KIM ,  Jaeha SHIM ,  Taegeun KANG

IPC: C01G53/00

CPC classification number: C01G53/42 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2006/40 ,  C01P2006/80

Abstract: A positive active material includes a first positive active material including a lithium nickel-based composite oxide and including secondary particles in which a plurality of primary particles are aggregated, and a cobalt coating portion on a surface of the secondary particles; and a second positive active material including a lithium nickel-based composite oxide and including single particles and a cobalt coating portion on a surface of the single particles, wherein the surface of the single particles includes a high-concentration coating region having a cobalt content of greater than or equal to about 30 at % and a low-concentration coating region having a cobalt content of less than or equal to about 25 at % based on the total amount of nickel and cobalt, and a difference between the cobalt content in the high-concentration coating region and a cobalt content in the low-concentration coating region is about 20 at % to about 50 at %.

公开(公告)号：US20250105448A1

公开(公告)日：2025-03-27

申请号：US18834036

申请日：2023-02-20

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Dongwan SEO ,  Jinyoung KIM ,  Hyeonseon CHOI

IPC: H01M50/446 ,  H01M50/414 ,  H01M50/434 ,  H01M50/491

Abstract: A separator for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided, and the separator for the rechargeable lithium battery includes a porous substrate and a coating layer on at least one surface of the porous substrate and including polyethylene particles and ceramics. The content of the polyethylene particles is 40 to 65 wt % by weight of the content of the porous substrate, the weight-average molecular weight of the polyethylene particles ranges from 1000 g/mol to 3000 g/mol, and the mixing ratio (ratio by weight) of the polyethylene particles to the ceramics ranges from 95:5 to 80:20.

公开(公告)号：US20250096415A1

公开(公告)日：2025-03-20

申请号：US18967511

申请日：2024-12-03

Applicant: Samsung SDI Co., Ltd.

Inventor： Jungyoon LEE ,  Hyeonsun CHOI ,  Yangseob KIM ,  Jinyoung KIM

IPC: H01M50/446 ,  H01M10/0525 ,  H01M10/0587 ,  H01M50/414 ,  H01M50/431 ,  H01M50/449

Abstract: This application relates to a separator and a lithium battery employing the same. In one aspect, the separator includes a porous substrate and a coating layer disposed on a surface of the porous substrate. The coating layer includes organic particles, a first binder, and inorganic particles. The organic particles have a first melting point of about 100□C to about 13□C. The first binder has a second melting point higher than the first melting point by about 30□C or more. The organic particles are coated by or embedded in the first binder. The separator can maintain a network structure even at a high temperature, making it possible to improve the high-temperature stability of a lithium battery by employing the separator, as well as delaying a rapid increase in temperature and heat generation when a shutdown occurs.

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：US20200295368A1

公开(公告)日：2020-09-17

申请号：US16817163

申请日：2020-03-12

Applicant: Samsung SDI Co., Ltd.

Inventor： Youngsun KONG ,  Kiyong AHN ,  Jinyoung KIM ,  Sung Ho CHOO ,  Seonyoung KWON

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

Abstract: A positive active material for a rechargeable lithium battery includes nickel-based lithium transition metal oxide secondary particles, in which a plurality of primary particles are aggregated. The primary particles include polycrystalline primary particles composed of 2 to 10 single crystals, and each of the single crystals has a particle diameter of about 0.5 μm to about 3 μm.

公开(公告)号：US20240166531A1

公开(公告)日：2024-05-23

申请号：US18229112

申请日：2023-08-01

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jungsue JANG ,  Jinyoung KIM ,  Donggyu CHANG ,  Jaeha SHIM ,  Taegeun KANG

IPC: C01G53/00 ,  H01M10/052

CPC classification number: C01G53/42 ,  H01M10/052 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/40

Abstract: A positive active material for a rechargeable lithium battery, a preparation method thereof, and a rechargeable lithium battery including the same are disclosed herein. The positive active material includes a first positive active material including a first lithium nickel-based composite oxide in a form of a secondary particle in which a plurality of primary particles are aggregated and including a boron coating portion on a surface of the secondary particle, and a second positive active material including a second lithium nickel-based composite oxide in a form of a single particle and including a boron coating portion on a surface of the single particle, wherein the second positive active material has an uneven surface with substantial irregularities and a flat surface without substantial irregularities.

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.