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：US20250158021A1

公开(公告)日：2025-05-15

申请号：US18650273

申请日：2024-04-30

Applicant: SAMSUNG SDI CO., LTD. ,  Research & Business Foundation SUNGKYUNKWAN UNIVERSITY

Inventor： Jaewon KIM ,  Young-Min KIM ,  Youngugk KIM ,  Eunji KANG ,  Deok-Hyun KIM ,  Hyejin KIM ,  Sunil PARK ,  llyoung CHOI ,  Doori OH ,  Narae KIM ,  Yookyung KIM ,  Young-Jun KIM ,  Junmyoung SHEEM

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/04 ,  H01M4/38 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0525

Abstract: A negative electrode active material includes a core including a silicon-carbon composite; and a coating layer on a surface of the core, the coating layer including a surfactant and graphene, wherein the negative electrode active material has a ratio (Isecond peak/Ifirst peak) of an intensity of a second peak appearing at 2θ=about 45° to about 50° relative to an intensity of a first peak appearing at 2θ=about 25° to about 27° of about 0.1 to about 0.4, in an X-ray diffraction analysis using a CuKα ray.

公开(公告)号：US20250132313A1

公开(公告)日：2025-04-24

申请号：US18636336

申请日：2024-04-16

Applicant: SAMSUNG SDI CO., LTD.

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

IPC: H01M4/36 ,  H01M4/133 ,  H01M4/587 ,  H01M10/052

Abstract: A negative electrode active material includes a core including secondary particles in which silicon primary particles and a metal carbide are agglomerated; and an amorphous carbon layer on a surface of the core, wherein the primary particles have a full width at half maximum (FWHM, 111) of greater than about 0.5°.

公开(公告)号：US20250105262A1

公开(公告)日：2025-03-27

申请号：US18654136

申请日：2024-05-03

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Yookyung KIM ,  Deok-Hyun KIM ,  Youngugk KIM

IPC: H01M4/36 ,  C01B33/021 ,  H01M4/02 ,  H01M4/38 ,  H01M10/052

Abstract: A negative electrode active material, including primary particles including silicon nanoparticles, and a metal coating layer including a metal material surrounding a surface of each of the silicon nanoparticles; a secondary particle where the primary particles are agglomerated; and an amorphous carbon coating layer surrounding a surface of the primary particles and a surface of the secondary particle, wherein the negative electrode active material has a span as defined by Equation 1 of about 1.1 to about 1.6, Span = ( D ⁢ 90 - D ⁢ 10 ) / D ⁢ 50 [ Equation ⁢ 1 ] wherein, D10 indicates a diameter of particles having a cumulative volume of 10 volume % in a particle size distribution, D50 indicates a diameter of particles having a cumulative volume of 50 volume % in the particle size distribution, and D90 indicates a diameter of particles having a cumulative volume of 90 volume % in the particle size distribution.

公开(公告)号：US20230017229A1

公开(公告)日：2023-01-19

申请号：US17930715

申请日：2022-09-08

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Inoh CHA ,  Deok-Hyun KIM ,  Jinhee LEE

IPC: H01M4/66 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525

Abstract: A negative electrode for a lithium secondary battery comprises a current collector and a negative electrode active material layer formed on the current collector, wherein the negative electrode active material layer includes a first negative electrode active material and a first binder, and a second active material layer formed on the first active material layer and including a second negative electrode active material and a second binder, a content of the first binder is greater than that of the second binder, a loading level of the negative electrode active material layer is 10 mg/cm2 to 30 mg/cm2, a loading level of the first active material layer is 4 mg/cm2 to 25 mg/cm2, a loading level of the second active material layer is 4 mg/cm2 to 25 mg/cm2, and a loading level of the second active material layer is equal to or higher than that of the first active material layer.

公开(公告)号：US20230006212A1

公开(公告)日：2023-01-05

申请号：US17930676

申请日：2022-09-08

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Inoh CHA ,  Deok-Hyun KIM ,  Jinhee LEE

IPC: H01M4/66 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525

Abstract: The present invention relates to a negative electrode for a lithium secondary battery and a lithium secondary battery comprising the same. The negative electrode for a lithium secondary battery comprises a current collector and a negative electrode active material layer formed on the current collector, wherein the negative electrode active material layer includes a first negative electrode active material and a first binder, and a second active material layer formed on the first active material layer and including a second negative electrode active material and a second binder, a content of the first binder is greater than that of the second binder, a loading level of the negative electrode active material layer is 10 mg/cm2 to 30 mg/cm2, a loading level of the first active material layer is 4 mg/cm2 to 25 mg/cm2, a loading level of the second active material layer is 4 mg/cm2 to 25 mg/cm2, and a loading level of the second active material layer is equal to or higher than that of the first active material layer.