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：US20250140911A1

公开(公告)日：2025-05-01

申请号：US18732918

申请日：2024-06-04

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Minsuk LEE ,  Jaewon KIM ,  Suyeol RYU ,  Guesung KIM ,  Young Gyoon RYU

IPC: H01M10/0562

Abstract: An all-solid rechargeable battery includes a negative electrode; a first solid electrolyte layer on one surface of the negative electrode; a second solid electrolyte layer on one surface of the first solid electrolyte layer, and a positive electrode on one surface of the second solid electrolyte layer, wherein the first solid electrolyte layer includes rounded first solid electrolyte particles, and the first solid electrolyte layer has a first thickness of 2 μm or less.

公开(公告)号：US20240213457A1

公开(公告)日：2024-06-27

申请号：US18535191

申请日：2023-12-11

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jaewon KIM ,  Yongseok KIM ,  Jaehou NAH ,  Youngugk KIM ,  Heeyoung CHU ,  Dae-Hyeok LEE ,  Hyejin KIM ,  Sojeong YU

IPC: H01M4/36 ,  H01M4/133 ,  H01M4/134 ,  H01M4/38 ,  H01M4/587 ,  H01M10/052

CPC classification number: H01M4/366 ,  H01M4/133 ,  H01M4/134 ,  H01M4/386 ,  H01M4/587 ,  H01M10/052 ,  H01M2004/027

Abstract: Disclosed are a negative active material for a rechargeable lithium battery and a rechargeable lithium battery. The negative active material for a rechargeable lithium battery includes a silicon-carbon composite; and graphene on a surface of the silicon-carbon composite, wherein a specific surface area of the negative active material is about 1.6 m2/g to about 2 m2/g.

公开(公告)号：US20240170656A1

公开(公告)日：2024-05-23

申请号：US18385018

申请日：2023-10-30

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Hyejin KIM ,  Yongseok KIM ,  Sojeong YU ,  Kyeu Yoon SHEEM ,  Jungjoon KIM ,  Jaewon KIM ,  Jaehou NAH ,  Eunjoo LEE

IPC: H01M4/38 ,  H01M4/46 ,  H01M4/485 ,  H01M4/583

CPC classification number: H01M4/386 ,  H01M4/466 ,  H01M4/485 ,  H01M4/583 ,  H01M2004/027

Abstract: A negative active material for a rechargeable lithium battery, having a core including porous silicon and about 1 wt % to about 12 wt % based on 100 wt % of a total weight of the negative active material of magnesium and a carbon layer on a surface of the core, to more effectively inhibit the expansion of the negative electrode and thereby more effectively inhibit the expansion of the secondary battery.

公开(公告)号：US20240282918A1

公开(公告)日：2024-08-22

申请号：US18607894

申请日：2024-03-18

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Eunjoo LEE ,  Yongseok KIM ,  Jaewon KIM ,  Jaehou NAH ,  KyeuYoon SHEEM

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/58 ,  H01M4/587 ,  H01M10/0525

CPC classification number: H01M4/364 ,  H01M4/366 ,  H01M4/386 ,  H01M4/5825 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: A negative active material for a rechargeable lithium battery and a rechargeable lithium battery, the negative active material includes a porous silicon-carbon composite that includes silicon, carbon, and magnesium silicate (MgSiO3), wherein the negative active material has a diffraction peak intensity ratio IMgSiO3(610)/ISi(111) of 0.001

公开(公告)号：US20250038186A1

公开(公告)日：2025-01-30

申请号：US18613370

申请日：2024-03-22

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Heeyoung CHU ,  Yongseok KIM ,  Dae-Hyeok LEE ,  Sojeong YU ,  Hyejin KIM ,  Jaewon KIM ,  Youngugk KIM ,  Jaehou NAH

IPC: H01M4/38 ,  H01M4/02 ,  H01M4/36 ,  H01M4/583

Abstract: A negative electrode active material and a rechargeable lithium battery that includes the negative electrode active material, the negative electrode active material includes porous silicon secondary particles in which boron-doped silicon primary particles are agglomerated; and amorphous carbon and the rechargeable lithium battery includes a negative electrode including the negative electrode active material, a positive electrode and an electrolyte.

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：US20240387797A1

公开(公告)日：2024-11-21

申请号：US18384401

申请日：2023-10-27

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Dae-Hyeok LEE ,  Jaehou NAH ,  Youngugk KIM ,  Yongseok KIM ,  Heeyoung CHU ,  Sojeong YU ,  Hyejin KIM ,  Jaewon KIM

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/38 ,  H01M4/583 ,  H01M10/052

Abstract: A negative electrode active material, including a silicon-carbon composite particle including a plurality of silicon nanoparticles and amorphous carbon, wherein the silicon-carbon composite particle includes closed pores therein, a pore volume of a surface of the silicon-carbon composite particle measured by a BJH method is less than about 0.02 cm3/g, and a volume of the closed pores of the silicon-carbon composite particle calculated by Equation 1 is about 0.015 cm3/g to about 0.05 cm3/g. Volume ⁢ of ⁢ closed ⁢ pores ⁢ in ⁢ a ⁢ particle = 
 ( ( theoretical ⁢ density ) - ( true ⁢ density ) ) - 1 - 
 ( pore ⁢ volume ⁢ measured ⁢ by ⁢ the ⁢ BJH ⁢ method ) [ Equation ⁢ 1 ]

公开(公告)号：US20230197932A1

公开(公告)日：2023-06-22

申请号：US17964135

申请日：2022-10-12

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jaewon KIM ,  Yongseok KIM ,  Sojeong YU ,  Kyeu Yoon SHEEM ,  Jungjoon KIM ,  Jaehou NAH ,  Hyejin KIM ,  Eunjoo LEE

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

CPC classification number: H01M4/364 ,  H01M4/386 ,  H01M4/583 ,  H01M10/052 ,  H01M2004/027

Abstract: A negative active material for a rechargeable lithium battery includes a composite of porous silicon and amorphous carbon, the composite having macropores with a size of about 50 nm or more, and a porosity of about 15% to about 40%.