公开(公告)号：US20230299288A1

公开(公告)日：2023-09-21

申请号：US17966984

申请日：2022-10-17

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Ilyoung CHOI ,  Soonbong CHOI ,  Joongho MOON ,  Hee Seon CHOI

IPC: H01M4/583 ,  H01M4/38 ,  H01M10/052 ,  H01M10/44

CPC classification number: H01M4/583 ,  H01M4/386 ,  H01M10/052 ,  H01M10/44 ,  H01M2004/027

Abstract: A negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the same, the negative active material including a rod-shaped crystalline carbon; and a silicon-carbon composite.

公开(公告)号：US20190386307A1

公开(公告)日：2019-12-19

申请号：US16479193

申请日：2018-01-17

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Hee Seon CHOI ,  Sangpil KIM ,  Youngugk KIM ,  Jiyeon KWAK ,  Yeongap KIM

IPC: H01M4/583 ,  H01M10/05

Abstract: Provided are an anode active material for a lithium secondary battery and a lithium secondary battery comprising the same, wherein the anode active material comprises at least three types of spherical graphite, and a difference between a 90% volume cumulative diameter (D90) and a 10% volume cumulative diameter (D10) is in the range of 13.0 μm≤(D90−D10)≤35.0 μm.

公开(公告)号：US20250125354A1

公开(公告)日：2025-04-17

申请号：US18989130

申请日：2024-12-20

Applicant: Samsung SDI Co., Ltd.

Inventor： Ilyoung CHOI ,  Soonbong Choi ,  Joogho MOON ,  Hee Seon CHOI

IPC: H01M4/583 ,  H01M4/02 ,  H01M4/38 ,  H01M10/052 ,  H01M10/44

Abstract: A negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the same, the negative active material including a rod-shaped crystalline carbon; and a silicon-carbon composite.

公开(公告)号：US20250070127A1

公开(公告)日：2025-02-27

申请号：US18948263

申请日：2024-11-14

Applicant: Samsung SDI Co., Ltd.

Inventor： Hee Seon CHOI

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

Abstract: A negative active material for a rechargeable lithium battery includes at least one particle selected from a composite crystalline carbon particle (A) including a crystalline carbon core and an amorphous carbon coating layer surrounding the crystalline carbon core; a composite crystalline carbon-silicon particle (B) including a mixed core of a crystalline carbon and silicon and an amorphous carbon coating layer surrounding the mixed core; and a composite silicon particle (C) including a silicon core and an amorphous carbon coating layer surrounding the silicon core, wherein the at least one particle has convexity in a range of about 0.85 to about 0.97 and circularity in a range of about 0.74 to about 0.90.

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：US20210249648A1

公开(公告)日：2021-08-12

申请号：US17170436

申请日：2021-02-08

Applicant: Samsung SDI Co., Ltd.

Inventor： Hee Seon CHOI

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

Abstract: A negative active material for a rechargeable lithium battery includes at least one particle selected from a composite crystalline carbon particle (A) including a crystalline carbon core and an amorphous carbon coating layer surrounding the crystalline carbon core; a composite crystalline carbon-silicon particle (B) including a mixed core of a crystalline carbon and silicon and an amorphous carbon coating layer surrounding the mixed core; and a composite silicon particle (C) including a silicon core and an amorphous carbon coating layer surrounding the silicon core, wherein the at least one particle has convexity in a range of about 0.85 to about 0.97 and circularity in a range of about 0.74 to about 0.90.

公开(公告)号：US20200152970A1

公开(公告)日：2020-05-14

申请号：US16630175

申请日：2018-07-10

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Sangeun PARK ,  Jiyeon KWAK ,  Yeongap KIM ,  Youngugk KIM ,  Uisong DO ,  Yuntaek OH ,  Yongchan YOU ,  Changui JEONG ,  Inoh CHA ,  Hee Seon CHOI

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/587 ,  H01M4/62 ,  C04B35/628 ,  C04B35/626 ,  C04B35/52

Abstract: The present invention relates to a negative active material for a lithium secondary battery, a preparation method therefor, and a lithium secondary battery including the same. The negative electrode active material is a negative electrode material for a secondary battery, the negative electrode active material comprising a silicon-carbon composite comprising: a core comprising crystalline carbon and silicon particles; and an amorphous carbon-containing coating layer disposed on a surface of the core, wherein the negative electrode active material comprises: silicon oxide formed on a surface of the silicon particles; and an oxide of crystalline carbon, formed on a surface of the crystalline carbon, the average particle diameter (D50) of the silicon particles having a nanometer size, the proportion of O relative to Si in the silicon oxide is 30%-50%, and the proportion of O relative to C in the oxide of the crystalline carbon is 4%-10%.

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：US20230268484A1

公开(公告)日：2023-08-24

申请号：US17965085

申请日：2022-10-13

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Hee Seon CHOI ,  Soonbong CHOI ,  Joongho MOON ,  Ilyoung CHOI

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

CPC classification number: H01M4/364 ,  H01M4/583 ,  H01M10/052 ,  H01M4/0404 ,  H01M2004/021

Abstract: A negative active material for a rechargeable lithium battery, a negative electrode including the same, and a rechargeable lithium battery including the same, the negative active material including about 8 wt % to about 50 wt % of a first active material; and about 50 wt % to about 92 wt % of a second active material, all wt % being based on a total weight of the negative active material, wherein the first active material includes a rod-shaped crystalline carbon having a maximum length of about 75 μm to about 160 μm.