公开(公告)号：US20240421289A1

公开(公告)日：2024-12-19

申请号：US18814587

申请日：2024-08-26

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Liangbin Liu ,  Jiazheng Wang ,  Zijian Lv ,  Yuan Li ,  Jingxian Deng ,  Donggen Xiong ,  Xiaobin Dong

IPC: H01M4/36 ,  C01B32/21 ,  H01M4/02 ,  H01M4/587 ,  H01M10/0525

Abstract: Provided are a negative electrode active material and a preparation method thereof, a secondary battery, and an electric apparatus. The negative electrode active material includes: a core material; and a first coating layer provided on at least part of a surface of the core material, where the first coating layer includes a porous carbon material and nano silicon-based particles, and the nano silicon-based particles are embedded into pore structures of the porous carbon material.

公开(公告)号：US20230207786A1

公开(公告)日：2023-06-29

申请号：US18059431

申请日：2022-11-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Liangbin Liu ,  Jiazheng Wang ,  Zijian Lv ,  Qingwei Yan ,  Binyi Chen

IPC: H01M4/36 ,  H01M4/134 ,  H01M10/04

CPC classification number: H01M4/366 ,  H01M4/134 ,  H01M10/0468 ,  H01M2004/027

Abstract: The present application provides a secondary battery including a negative electrode sheet, and the negative electrode sheet includes: a negative electrode current collector; a first negative film layer provided on at least one surface of the negative electrode current collector; and a second negative film layer provided on a surface of the first negative film layer; where the first negative film layer includes a first negative active material and a first conductive agent, and the first negative active material includes a silicon-based material; and a mass proportion of the silicon-based material in the first negative film layer is greater than or equal to 30%, and a mass proportion of the first conductive agent in the first negative film layer is greater than or equal to 25%. A battery cell of the secondary battery of the present application does not easily expand and has good cycle performance.

公开(公告)号：US20240274805A1

公开(公告)日：2024-08-15

申请号：US18636204

申请日：2024-04-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Kai Wu ,  Zijian Lv ,  Jiazheng Wang ,  Liangbin Liu ,  Jingxian Deng

IPC: H01M4/38 ,  H01M4/02 ,  H01M4/04 ,  H01M4/36 ,  H01M4/583

CPC classification number: H01M4/386 ,  H01M4/0421 ,  H01M4/364 ,  H01M4/366 ,  H01M4/583 ,  H01M2004/021 ,  H01M2004/027

Abstract: The present application provides a negative electrode active material, a secondary battery comprising the same and an electrical device, wherein the negative electrode active material comprises a matrix material and a silicon-based material, the matrix material comprises a plurality of pore structures, at least a part of the silicon-based material is located in pore structures of the matrix material, at least a part of the silicon-based material has a crystalline structure, the silicon-based material comprises a first silicon-based material and a second silicon-based material with different grain sizes, and a ratio of grain size of the first silicon-based material to grain size of the second silicon-based material is greater than or equal to 1.6. The negative electrode active material can result in a secondary battery having high energy density, high First Coulombic Efficiency, long cycle life and long storage life at the same time.

公开(公告)号：US20240170659A1

公开(公告)日：2024-05-23

申请号：US18430676

申请日：2024-02-02

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jiazheng Wang ,  Qingwei Yan ,  Liangbin Liu ,  Xiaobin Dong ,  Zijian Lv

IPC: H01M4/48 ,  H01M4/133 ,  H01M4/139 ,  H01M4/36 ,  H01M4/587 ,  H01M4/62 ,  H01M4/02

CPC classification number: H01M4/483 ,  H01M4/133 ,  H01M4/139 ,  H01M4/366 ,  H01M4/587 ,  H01M4/622 ,  H01M4/625 ,  H01M2004/021 ,  H01M2004/027

Abstract: Provided is a negative electrode plate, comprising: a negative electrode current collector and a first negative electrode active material layer. The first negative electrode active material layer is arranged on at least one surface of the negative electrode current collector, wherein, components of the first negative electrode active material layer comprise, by mass: 30%-70% of a silicon-based material, 15%-40% of a binder and 15%-40% of a conductive agent.