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：US20230028390A1

公开(公告)日：2023-01-26

申请号：US17930714

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：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：US20200335795A1

公开(公告)日：2020-10-22

申请号：US16753319

申请日：2018-08-27

Applicant: Samsung SDI Co., Ltd.

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

IPC: H01M4/66 ,  H01M4/62 ,  H01M4/36 ,  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.

公开(公告)号：US20250079448A1

公开(公告)日：2025-03-06

申请号：US18734018

申请日：2024-06-05

Applicant: SAMSUNG SDI CO., LTD. ,  IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)

Inventor： SUNIL PARK ,  Hansu KIM ,  Donghyeok MA ,  Mi YU ,  Youngugk KIM ,  Deok-Hyun KIM ,  Ilyoung CHOI

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/485 ,  H01M4/583 ,  H01M10/0525

Abstract: A negative electrode active material and a rechargeable lithium battery including the negative electrode active material, the negative electrode active material includes a core including a carbon material, a silicon material, or a combination thereof; and a shell on a surface of the core, the shell including Si and LixSiOy, in which 1≤x≤3 and 1≤y≤6.

公开(公告)号：US20250070176A1

公开(公告)日：2025-02-27

申请号：US18645467

申请日：2024-04-25

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Ilyoung CHOI ,  Deok-Hyun KIM ,  Youngugk KIM

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/133 ,  H01M4/587 ,  H01M10/052

Abstract: A negative electrode includes a current collector; and a negative electrode active material on the current collector, the negative electrode active material layer including a polymer having a potential band vs. Li of less than or equal to about 1.5 V, and a silicon active material, wherein the negative electrode has a binding force of greater than or equal to about 1.0 gf/mm and an electrical conductivity of about 1.0 S/m to about 6.0 S/m.

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：US20240379944A1

公开(公告)日：2024-11-14

申请号：US18380353

申请日：2023-10-16

Applicant: SAMSUNG SDI CO., LTD. ,  University-Industry Cooperation Group of Kyung Hee University

Inventor： Ilyoung CHOI ,  Min-Sik PARK ,  Taehee KIM ,  Sungmin PARK ,  Deok-Hyun KIM ,  Jaehou NAH ,  Youngugk KIM ,  Joo Hyeong SUH

IPC: H01M4/36 ,  C01B32/21 ,  C01B32/914 ,  C01B32/921 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/02

Abstract: A negative active material and a rechargeable lithium battery including the negative active material, the negative active material includes a core including a carbon material; and a metal carbide on a surface of the core, wherein the metal of the metal carbide is Ti, Mo, Fe, Nb, Ta, W, or V.

公开(公告)号：US20160233501A1

公开(公告)日：2016-08-11

申请号：US15001555

申请日：2016-01-20

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Su-Kyung LEE ,  Sang-Hyuck AHN ,  Deok-Hyun KIM ,  Xianhui MENG ,  Young Jin CHOI ,  Sang-Pil KIM ,  Yong-Chan YOU

IPC: H01M4/38 ,  H01M10/0525

CPC classification number: H01M4/386 ,  H01M4/134 ,  H01M4/364 ,  H01M4/587 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/021

Abstract: A negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided, and the negative active material includes a Si-based alloy; a first graphite material; and a second graphite material having a different average particle diameter from the first graphite material.

Abstract translation: 提供了一种用于可再充电锂电池和包括其的可再充电锂电池的负极活性材料，负极活性材料包括Si基合金; 第一石墨材料; 以及与第一石墨材料具有不同平均粒径的第二石墨材料。

公开(公告)号：US20250125342A1

公开(公告)日：2025-04-17

申请号：US18731582

申请日：2024-06-03

Applicant: SAMSUNG SDI CO., LTD. ,  POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION

Inventor： Seyoung OH ,  Sang-Min LEE ,  Hwijoo LEE ,  Ilyoung CHOI ,  Deok-Hyun KIM ,  Youngugk KIM

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/04 ,  H01M4/48 ,  H01M4/583 ,  H01M4/60 ,  H01M10/0525

Abstract: A negative electrode active material and a rechargeable lithium battery including the negative electrode active material, the negative electrode active material includes a core including a carbon material; vanadium oxide on a surface of the core; and a fluorine (F)-containing carbon layer on the surface of the core and on a surface of the vanadium oxide.