公开(公告)号：US20240274811A1

公开(公告)日：2024-08-15

申请号：US18645356

申请日：2024-04-24

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zaiyu Zhuang ,  Yale Wu ,  Ming Zhang ,  Tongxian Zhang

IPC: H01M4/505 ,  C01B32/159 ,  C01B32/174 ,  H01M4/02 ,  H01M4/131 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/505 ,  C01B32/159 ,  C01B32/174 ,  H01M4/131 ,  H01M4/625 ,  H01M10/0525 ,  C01B2202/02 ,  C01B2202/22 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/028

Abstract: Provided are a positive electrode material, a positive electrode plate, a secondary battery, a battery module, a battery pack, and an electrical apparatus. The positive electrode material comprises a manganese-containing active material and a functionalized carbon nanotube, where a surface of the functionalized carbon nanotube comprises lone pair electrons. The lone pair electrons on the surface of the functionalized carbon nanotube have a strong coordination capability. During charging and discharging of the secondary battery, the lone pair electrons can form a coordination structure with Mn2+ dissolved from the manganese-containing active material, to reduce the dissolution of the Mn2+, thereby improving a manganese dissolution phenomenon of the secondary battery, and then improving cycling performance of the secondary battery.

公开(公告)号：US20240347709A1

公开(公告)日：2024-10-17

申请号：US18751373

申请日：2024-06-24

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yale Wu ,  Ming Zhang ,  Jimin Yang

IPC: H01M4/36 ,  B01J21/06 ,  B01J23/745 ,  B01J35/45 ,  B01J37/02 ,  B01J37/18 ,  C01B32/162 ,  C01B33/02 ,  H01M4/02 ,  H01M4/38 ,  H01M4/587

CPC classification number: H01M4/366 ,  B01J21/06 ,  B01J23/745 ,  B01J35/45 ,  B01J37/0207 ,  B01J37/0236 ,  B01J37/18 ,  C01B32/162 ,  C01B33/02 ,  H01M4/386 ,  H01M4/587 ,  C01B2202/22 ,  C01B2202/34 ,  C01P2004/03 ,  C01P2004/13 ,  C01P2004/61 ,  C01P2004/80 ,  C01P2006/12 ,  C01P2006/40 ,  C01P2006/80 ,  H01M2004/021 ,  H01M2004/027

Abstract: Provided are a silicon negative electrode material, which is characterized by comprising silicon particles and carbon nanotubes grown on the surface of the silicon particles, wherein the carbon nanotubes comprise fluffy carbon nanotubes and intertwined filamentary carbon nanotubes, and the silicon particles are wrapped by the fluffy carbon nanotubes and the filamentary carbon nanotubes. Further provided is a method for preparing the silicon negative electrode material.

公开(公告)号：US20240274822A1

公开(公告)日：2024-08-15

申请号：US18640001

申请日：2024-04-19

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qifan Wu ,  Ming Zhang ,  Yale Wu

IPC: H01M4/62 ,  H01M4/02

CPC classification number: H01M4/623 ,  H01M2004/021 ,  H01M2004/027

Abstract: This application relates to a negative electrode plate including a negative electrode current collector and a negative electrode film layer on at least one surface of the negative electrode current collector, where the negative electrode film layer includes a fluoropolymer, the fluoropolymer includes at least one of a polymer of a monomer in formula 1 and a copolymer of a monomer in formula 1 and a monomer in formula 2, and the fluoropolymer is present in the negative electrode film layer in form of spherical particles. This application further relates to a preparation method of negative electrode plate, a secondary battery, a battery module, a battery pack, and an electric apparatus.