公开(公告)号：US20250118748A1

公开(公告)日：2025-04-10

申请号：US18983233

申请日：2024-12-16

Applicant: SAMSUNG SDI CO., LTD.

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

IPC: H01M4/583 ,  H01M4/02 ,  H01M4/04 ,  H01M10/0525 ,  H01M10/44

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：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：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：US20200083536A1

公开(公告)日：2020-03-12

申请号：US16560522

申请日：2019-09-04

Applicant: Samsung SDI Co., Ltd.

Inventor： Eunjoo LEE ,  Jaehou NAH

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

Abstract: A negative active material for a rechargeable lithium battery includes natural graphite including secondary particles in which a plurality of primary particles are assembled; amorphous carbon on the surface of the primary particles; and a coating layer including amorphous carbon surrounding the secondary particles, wherein the primary particles have an average particle diameter of about 5 μm to about 15 μm, the secondary particles have an average particle diameter of about 8 μm to about 24 μm, and a peak intensity ratio I(002)/I(110) is less than or equal to about 120 as measured by X-ray diffraction.

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：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.

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%.

公开(公告)号：US20230078236A1

公开(公告)日：2023-03-16

申请号：US17939142

申请日：2022-09-07

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Eunjoo LEE ,  Yongseok KIM ,  Jaewon KIM ,  Jaehou NAH ,  Kyeu Yoon SHEEM

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

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