公开(公告)号：US20240379959A1

公开(公告)日：2024-11-14

申请号：US18386322

申请日：2023-11-02

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Hee Seon CHOI ,  Deok-Hyun KIM ,  Yurim CHA ,  Narae KIM

IPC: H01M4/587 ,  H01M4/36 ,  H01M10/0525

Abstract: A negative active material for a rechargeable lithium battery and a rechargeable lithium battery that includes the negative active material. The negative active material includes a first active material, which includes tertiary particles of natural graphite in which secondary particles are agglomerated. Primary particles are agglomerated and spheroidized in the secondary particles. Artificial graphite is positioned on a surface of the primary particles and a surface of the secondary particles. An amorphous carbon coating layer surrounds the tertiary particles of natural graphite. Further, the negative active material includes a second active material, which includes a carbon-based material having an aspect ratio of about 2 to about 100.

公开(公告)号：US20210280868A1

公开(公告)日：2021-09-09

申请号：US17190863

申请日：2021-03-03

Applicant: Samsung SDI Co., Ltd.

Inventor： Sunil PARK ,  Narae KIM ,  Jaehou NAH ,  Joongho MOON ,  Hyun SOH ,  Eunjoo LEE

IPC: H01M4/583 ,  H01M10/44 ,  H01M10/0525 ,  H01M4/04

Abstract: A negative active material for a rechargeable lithium battery includes a secondary particle in which a plurality of natural graphite primary particles are agglomerated, the plurality of primary particles including natural graphite, and the secondary particle including pores, and an amorphous carbon positioned in the pores, wherein an area of the amorphous carbon is about 10% to about 30% based on a total area of 100% of the negative active material, in a cross-section of the negative active material.

公开(公告)号：US20250023034A1

公开(公告)日：2025-01-16

申请号：US18383082

申请日：2023-10-24

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Hyejin KIM ,  Pil Jin YOO ,  Deok-Hyun KIM ,  Youngugk KIM ,  Jaehou NAH ,  Ilyoung CHOI ,  Eunji KANG ,  Sunil PARK ,  Jaewon KIM ,  Doori OH ,  Yookyung KIM ,  Narae KIM ,  Banseok LEE

IPC: H01M4/38 ,  H01M4/36 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/44

Abstract: A negative active material includes a core having a silicon-carbon composite and a polymer coating layer formed on the core, wherein the negative active material has about 1.02 to about 1.6 of a ratio of height of N1s peak occurring at about 400±about 0.5 eV relative to a height of N1s peak occurring at about 405±about 0.5 eV of a bonding energy, and about 1.02 to about 3.0 of a ratio of a height of C1s peak occurring at about 286.5±about 0.5 eV relative to a height of C1s peak occurring at about 290±about 0.5 eV when an X-ray photoelectron spectroscopy (XPS) is measured.

公开(公告)号：US20250070132A1

公开(公告)日：2025-02-27

申请号：US18672314

申请日：2024-05-23

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Narae KIM ,  Deok-Hyun Kim ,  Youngugk Kim ,  Eunji Kang ,  Jaewon Kim ,  IIyoung Choi ,  Hyejin Kim ,  Yookyung Kim ,  Banseok Lee

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/583 ,  H01M4/60 ,  H01M10/052

Abstract: A negative electrode active material, including silicon nanoparticles including an amorphous carbon coating layer on a surface of the silicon nanoparticles; and pores, wherein the negative electrode active material has a sphericity as represented by Equation 1 of about 0.9 to about 1.0, and the pores include mesopores, and a ratio of a mesopores volume relative to a total pore volume of the negative electrode active material is about 30% or more and less than about 70%, and Sphericity ⁢ ( S ) = 4 ⁢ π × A / B 2 [ Equation ⁢ 1 ] in Equation 1, A is an area of the negative electrode active material and B is a circumference of a shape of the negative electrode active material.

公开(公告)号：US20240250243A1

公开(公告)日：2024-07-25

申请号：US18397047

申请日：2023-12-27

Applicant: Samsung SDI Co., Ltd.

Inventor： Narae KIM ,  Deok-Hyun KIM ,  Hee Seon CHOI ,  Yurim CHA

IPC: H01M4/36 ,  H01M4/587 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/027

Abstract: A negative active material for a rechargeable lithium battery, including tertiary particles including graphite and an agglomerated product where secondary particles where g a plurality of primary particles is agglomerated and spheroidized, are agglomerated, and an amorphous carbon coating layer surrounding the tertiary particles.

公开(公告)号：US20240347730A1

公开(公告)日：2024-10-17

申请号：US18487897

申请日：2023-10-16

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Narae KIM ,  Yurim CHA ,  Seyoung OH ,  Deok-Hyun KIM ,  Chungku YEO

IPC: H01M4/587 ,  C01B32/21 ,  H01M4/133 ,  H01M10/052

CPC classification number: H01M4/587 ,  C01B32/21 ,  H01M4/133 ,  H01M4/1393 ,  H01M10/052 ,  C01B2204/22 ,  C01P2002/74 ,  C01P2004/03 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/40 ,  H01M2004/027

Abstract: A negative active material and a rechargeable lithium battery including the same are provided. The negative active material includes (e.g., consists of) an amorphous carbon material, low crystalline graphite particles and pores within the amorphous carbon material and/or the low crystalline graphite particles, wherein a ratio of a cross-sectional area of the pores relative to a cross-sectional area of the negative active material is about 4% to about 10%.

公开(公告)号：US20210280855A1

公开(公告)日：2021-09-09

申请号：US17190802

申请日：2021-03-03

Applicant: Samsung SDI Co., Ltd.

Inventor： Eunjoo LEE ,  Narae KIM ,  Joongho MOON ,  Sunil PARK

IPC: H01M4/36 ,  H01M4/38 ,  H01M10/0525

Abstract: A rechargeable lithium battery includes a negative active material including: a secondary particle including a core in which a plurality of primary particles are agglomerated, the primary particles including a natural graphite; and a coating layer including amorphous carbon and surrounding the core, wherein a Raman peak intensity ratio of a D peak (1350 cm−1 to 1370 cm−1) to a D′ peak (1570 cm−1 to 1620 cm−1) (ID/ID′) of the negative active material is about 3.2 to about 3.8, and a lattice constant La of the negative active material is about 30 nm to about 45 nm.