公开(公告)号：US20210242455A1

公开(公告)日：2021-08-05

申请号：US17156457

申请日：2021-01-22

Applicant: Samsung SDI Co., Ltd.

Inventor： Chul YOUM

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/587 ,  H01M4/48

Abstract: Disclosed is a negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the same. The negative active material includes: a silicon primary particle core having a particle size of micrometers; a particle layer formed by agglomerating silicon oxide primary particles having a particle size of 10 nm or less on a surface of the core, the particle layer including pores; and a carbon-based material filled in the pores of the particle layer.

公开(公告)号：US20250059049A1

公开(公告)日：2025-02-20

申请号：US18642894

申请日：2024-04-23

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Chul YOUM

IPC: C01B33/029 ,  H01M4/02 ,  H01M4/04 ,  H01M4/36 ,  H01M4/583 ,  H01M10/052

Abstract: A negative electrode active material, a method of preparing the negative electrode active material, and a rechargeable lithium battery that includes the negative electrode active material, the negative active material includes amorphous nano-sized Si particles 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：US20210265626A1

公开(公告)日：2021-08-26

申请号：US17176592

申请日：2021-02-16

Applicant: Samsung SDI Co., Ltd.

Inventor： Chul YOUM

IPC: H01M4/38 ,  H01M4/36 ,  H01M4/48 ,  H01M4/583 ,  H01M10/44 ,  H01M10/0525

Abstract: Disclosed are a negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the same. The negative active material includes: a silicon particle core comprising a silicon particle having a particle size in a micrometer range; an oxide layer having a thickness in a range of about 65 nm to about 450 nm, on the silicon particle core; and a conductive layer on the oxide layer.

公开(公告)号：US20230361275A1

公开(公告)日：2023-11-09

申请号：US18012470

申请日：2021-11-15

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Dae-Hyeok LEE ,  Youngugk KIM ,  Jaemyung KIM ,  Jaehou NAH ,  Changsu SHIN ,  Chul YOUM ,  Jongmin WON ,  Jungho LEE ,  Heeyoung CHU

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

CPC classification number: H01M4/364 ,  H01M4/386 ,  H01M4/587 ,  H01M10/052 ,  H01M2004/021

Abstract: Provides are an anode active material for a lithium secondary battery and a lithium secondary battery comprising same, wherein the anode active material for a lithium secondary battery comprises a silicon-carbon composite having a void in the central portion, the radius of the central portion corresponds to 30% to 50% of the radius of the anode active material for a lithium secondary battery, and the silicon-carbon composite includes silicon nanoparticles and amorphous carbon.

公开(公告)号：US20220020980A1

公开(公告)日：2022-01-20

申请号：US17375365

申请日：2021-07-14

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Changsu SHIN ,  Heeyoung CHU ,  Youngugk KIM ,  Jaemyung KIM ,  Chul YOUM ,  Jongmin WON ,  Dae-Hyeok LEE ,  Jungho LEE

IPC: H01M4/36 ,  H01M4/485 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/62

Abstract: A negative active material for a rechargeable lithium battery, a negative electrode, and a rechargeable lithium battery including the same, the negative active material including a core including silicon nanoparticles and a lithium titanium-based oxide; and an amorphous carbon layer on a surface of the core.

公开(公告)号：US20180026257A1

公开(公告)日：2018-01-25

申请号：US15655258

申请日：2017-07-20

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Doori OH ,  Chul YOUM

IPC: H01M4/133 ,  H01M10/0525 ,  H01M4/134

CPC classification number: H01M4/133 ,  G01N23/2273 ,  H01M4/0471 ,  H01M4/134 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/364 ,  H01M4/366 ,  H01M4/386 ,  H01M4/485 ,  H01M4/587 ,  H01M4/625 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/027

Abstract: A negative active material for a rechargeable lithium battery includes a silicon-carbon composite including a core including a crystalline carbon material, a silicon oxide, and a silicon particle and an amorphous carbon-containing coating layer on the surface of the core. An intensity ratio (Si/SiO2) of a Si peak relative to a SiO2 peak ranges from about 2.0 to about 3.0 as measured using an X-ray photoelectron spectroscopy for the negative active material.