公开(公告)号：US20240124699A1

公开(公告)日：2024-04-18

申请号：US18515290

申请日：2023-11-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lianwei Duan ,  Huihui Liu ,  Cheng Li ,  Wei Feng

IPC: C08L27/16 ,  C08L33/08 ,  H01M4/58 ,  H01M4/62

CPC classification number: C08L27/16 ,  C08L33/08 ,  H01M4/5825 ,  H01M4/623 ,  H01M4/625 ,  H01M2004/028

Abstract: Provided are a binder composition, an electrode, a battery and a power consuming device. The binder composition comprises a fluoropolymer A and a copolymer B, wherein the copolymer B comprises a structural unit derived from a monomer containing a cyano group and a structural unit derived from a monomer containing an ester group. The binder of the present application has a strong bonding force, and the cycling performance of the secondary battery comprising same is excellent.

公开(公告)号：US20240213484A1

公开(公告)日：2024-06-27

申请号：US18415696

申请日：2024-01-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lianwei Duan ,  Huihui Liu

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/04

CPC classification number: H01M4/623 ,  H01M4/0404 ,  H01M2004/021

Abstract: The present application provides a binder, including a polyvinylidene fluoride having a weight average molar mass of 1.5 million to 5.0 million; optionally, the polyvinylidene fluoride has a weight average molar mass of 1.8 million to 3.2 million.

公开(公告)号：US20240213481A1

公开(公告)日：2024-06-27

申请号：US18587996

申请日：2024-02-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cheng Li ,  Huihui Liu ,  Lianwei Duan

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/485 ,  H01M10/052

CPC classification number: H01M4/622 ,  H01M4/485 ,  H01M4/625 ,  H01M10/052 ,  H01M2004/028

Abstract: The present application provides a binder, a preparation method therefor, a secondary battery, a battery module, a battery pack, and a power consuming device. The binder comprises a polymer comprising structural units derived from a monomer represented by formula I and structural units derived from a monomer represented by formula II, wherein R1 and R2 are each independently selected from hydrogen or substituted or unsubstituted C1-5 alkyl, R3 is selected from hydrogen or methyl, and R4 is selected from substituted or unsubstituted C1-9 alkyl. The binder can be coated on the surface of the positive electrode active material, which is beneficial to maintain the structural integrity of the positive electrode active material during the cycling of the positive electrode plate, thereby improving the cycling performance of the battery.

公开(公告)号：US11888150B2

公开(公告)日：2024-01-30

申请号：US18354618

申请日：2023-07-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huihui Liu ,  Lingyun Feng ,  Yanhuang Fan ,  Lianwei Duan

IPC: H01M4/136 ,  H01M4/36 ,  H01M4/62 ,  H01M4/58 ,  H01M4/583 ,  H01M4/02

CPC classification number: H01M4/136 ,  H01M4/366 ,  H01M4/583 ,  H01M4/5825 ,  H01M4/622 ,  H01M4/625 ,  H01M2004/021 ,  H01M2004/028

Abstract: A positive electrode plate includes a positive electrode current collector, a positive electrode film layer arranged on at least one surface of the positive electrode current collector, and a conductive undercoat layer positioned between the positive electrode current collector and the positive electrode film layer. The positive electrode film layer includes a positive electrode active material including an inner core and a shell coating the inner core. The shell includes a first coating layer coating the inner core, a second coating layer coating the first coating layer, and a third coating layer coating the second coating layer. The conductive undercoat layer includes a polymer, an aqueous binder, and a conductive agent.