公开(公告)号：US12176540B2

公开(公告)日：2024-12-24

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 ,  H01M4/02

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：US12132194B2

公开(公告)日：2024-10-29

申请号：US18326895

申请日：2023-05-31

Applicant: Samsung SDI Co., Ltd.

Inventor： Ji Woo Ahn ,  Dongwoo Kim ,  Jaehou Nah ,  Bumjin Chang ,  Yurim Cha ,  Yeonjoo Choi ,  Ilyoung Choi

IPC: H01M4/133 ,  H01M4/36 ,  H01M4/38 ,  H01M4/587

CPC classification number: H01M4/133 ,  H01M4/366 ,  H01M4/386 ,  H01M4/387 ,  H01M4/587

Abstract: A negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the same are disclosed, and the negative active material includes a primary particle of a crystalline carbon-based material and secondary particle that is an assembly of the primary particles, wherein a ratio of an average particle diameter (D50) of the secondary particle relative to an average particle diameter (D50) of the primary particle (average particle diameter (D50) of the secondary particle/average particle diameter (D50) of the primary particle) ranges from about 1.5 to about 5 and an aspect ratio of the primary particle ranges from about 1 to about 7.

公开(公告)号：US11705552B2

公开(公告)日：2023-07-18

申请号：US16312972

申请日：2017-07-10

Applicant: Samsung SDI Co., Ltd.

Inventor： Ji Woo Ahn ,  Dongwoo Kim ,  Jaehou Nah ,  Bumjin Chang ,  Yurim Cha ,  Yeonjoo Choi ,  Ilyoung Choi

IPC: H01M4/133 ,  H01M4/36 ,  H01M4/38 ,  H01M4/587

CPC classification number: H01M4/133 ,  H01M4/366 ,  H01M4/386 ,  H01M4/387 ,  H01M4/587

Abstract: A negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the same are disclosed, and the negative active material includes a primary particle of a crystalline carbon-based material and secondary particle that is an assembly of the primary particles, wherein a ratio of an average particle diameter (D50) of the secondary particle relative to an average particle diameter (D50) of the primary particle (average particle diameter (D50) of the secondary particle/average particle diameter (D50) of the primary particle) ranges from about 1.5 to about 5 and an aspect ratio of the primary particle ranges from about 1 to about 7.

公开(公告)号：US11335906B2

公开(公告)日：2022-05-17

申请号：US16437803

申请日：2019-06-11

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Joongho Moon ,  Eunji Kang ,  Yurim Cha ,  Soonbong Choi

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

Abstract: A negative active material for a rechargeable lithium battery includes: a core including crystalline carbon; and a metal alkoxide on a surface of the core. A rechargeable lithium battery includes: a negative electrode including a negative active material including a core including crystalline carbon, and a metal alkoxide on a surface of the core; a positive electrode including a positive active material; and an electrolyte.