公开(公告)号：US20240282974A1

公开(公告)日：2024-08-22

申请号：US18650640

申请日：2024-04-30

Applicant: Ningde Amperex Technology Limited

Inventor： Xin LI

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/36 ,  H01M4/485

CPC classification number: H01M4/628 ,  H01M4/366 ,  H01M4/485 ,  H01M2004/021 ,  H01M2004/027

Abstract: A negative electrode active material includes carbon-silicon-oxygen particles and an aluminum oxide layer located on a surface of the carbon-silicon-oxygen particles, where the carbon-silicon-oxygen particles are represented by SiCxOy, 0

公开(公告)号：US20250105265A1

公开(公告)日：2025-03-27

申请号：US18894061

申请日：2024-09-24

Applicant: Ningde Amperex Technology Limited

Inventor： Xin LI ,  Yisong SU ,  Yuansen XIE

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/60 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0569

Abstract: A negative active material includes a silicon-based composite material. The silicon-based composite material includes a silicon substrate, a conductive agent and a polymer. The conductive agent and the polymer are disposed on at least a portion of a surface of the silicon substrate. The silicon-based composite material has a powder conductivity from 0.03 S/cm to 0.1 S/cm.

公开(公告)号：US20240282939A1

公开(公告)日：2024-08-22

申请号：US18652001

申请日：2024-05-01

Applicant: Ningde Amperex Technology Limited

Inventor： Xin LI

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/58 ,  H01M4/583 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M4/386 ,  H01M4/58 ,  H01M4/583 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: A negative active material includes silicon-oxygen particles and a silicon-oxygen-carbon layer located on surfaces of the silicon-oxygen particles, where the silicon-oxygen-carbon layer includes silicon-oxygen-carbon composite particles. Applied to an electrochemical device, the negative active material improves the cycle performance significantly.

公开(公告)号：US20240266518A1

公开(公告)日：2024-08-08

申请号：US18622217

申请日：2024-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Xin LI

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/505 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M4/505 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: An electrochemical device includes a negative electrode. The negative electrode includes a negative active material layer. The negative active material layer includes a negative active material. The negative active material includes a magnesium-doped carbon-silicon-oxide material. A surface of a crystalline oxide of the magnesium-doped carbon-silicon-oxide material is coated with a carbon nanotube cladding layer. By employing the magnesium-doped carbon-silicon-oxide material coated with a carbon nanotube capping layer, the electrochemical device can improve the first-cycle Coulombic efficiency of the electrochemical device, optimize structural stability of the electrochemical device during cycling, and in turn, improve a cycle capacity retention rate and cycle performance of the electrochemical device.