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：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：US20230017229A1

公开(公告)日：2023-01-19

申请号：US17930715

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：US20230006212A1

公开(公告)日：2023-01-05

申请号：US17930676

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: 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：US20190006679A1

公开(公告)日：2019-01-03

申请号：US16023238

申请日：2018-06-29

Applicant: SAMSUNG SDI CO., LTD.

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

IPC: H01M4/62 ,  H01M4/133 ,  H01M4/134 ,  H01M4/36 ,  H01M4/38 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0587

Abstract: An anode includes a composite anode active material including a core and a coating layer on the core, the core including a metal alloyable with lithium. The coating layer includes a first polymer having a first functional group and a binder including a second polymer having a second functional group. The first polymer and the second polymer are cross-linked with each other via ester bonding between the first functional group and the second functional group.

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：US20190252673A1

公开(公告)日：2019-08-15

申请号：US16240145

申请日：2019-01-04

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Inoh CHA ,  Jinhee LEE ,  Chaewoong CHO

IPC: H01M4/133 ,  H01M4/587 ,  H01M10/0525

CPC classification number: H01M4/133 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2004/021 ,  H01M2004/027

Abstract: A negative electrode for a rechargeable lithium battery includes a current collector and a negative active material layer disposed on the current collector. The negative active material layer includes a conductive material including a linear-shaped carbon-based material having an average length of about 40 μm to about 250 μm and a dot-shaped carbon-based material, and a negative active material. A mixing ratio of the conductive material and the negative active material is a weight ratio of about 0.1:99.9 to about 2.0:98.0.

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.