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：US20240170655A1

公开(公告)日：2024-05-23

申请号：US18471751

申请日：2023-09-21

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Yeongap KIM

IPC: H01M4/36 ,  G01N23/2055 ,  H01M4/38 ,  H01M4/583 ,  H01M10/052

CPC classification number: H01M4/366 ,  G01N23/2055 ,  H01M4/386 ,  H01M4/583 ,  H01M10/052 ,  H01M2004/027

Abstract: A negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the negative electrode. The negative electrode for the rechargeable lithium battery includes a negative a negative active material layer including a negative active material including a silicon core and an amorphous carbon layer on a surface of the core. An amount of the carbon-based conductive material is about 10 wt % or more based on the total, 100 wt % of the negative active material layer, and the negative electrode has a peak intensity ratio (I(010)/I(002)) at a (110) plane relative to a (002) plane of about 1.0 or more measured by x-ray diffraction (XRD).

公开(公告)号：US20250006894A1

公开(公告)日：2025-01-02

申请号：US18677645

申请日：2024-05-29

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Injoe JUNG ,  Fumiko KIMURA ,  Yeongap KIM ,  Seongho JEON

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/583

Abstract: An electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided. The electrode includes an active material layer including an active material and having a first hole and a second hole, the second hole having a depth greater than a depth of the first hole, wherein a ratio of the depth of the first hole to (:) the depth of the second hole is about 1:2 to about 1:5.

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：US20180026262A1

公开(公告)日：2018-01-25

申请号：US15621521

申请日：2017-06-13

Applicant: SAMSUNG SDI CO., LTD.

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

IPC: H01M4/36 ,  H01M10/0525 ,  H01M10/0568 ,  H01M4/587 ,  H01M4/525 ,  H01M10/0569 ,  H01M4/04 ,  H01M4/38

CPC classification number: H01M4/366 ,  H01M4/0435 ,  H01M4/0471 ,  H01M4/364 ,  H01M4/386 ,  H01M4/525 ,  H01M4/587 ,  H01M4/625 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2004/027 ,  H01M2300/004

Abstract: A negative active material includes a silicon-based material core and a pitch coating layer on a surface of the silicon-based material core. The pitch coating layer includes a mesophase pitch.