公开(公告)号：US20230223538A1

公开(公告)日：2023-07-13

申请号：US18188686

申请日：2023-03-23

Applicant: Ningde Amperex Technology Limited

Inventor： Shuo WANG ,  Jiali DONG ,  Jia TANG ,  Yuansen XIE

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

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

Abstract: A negative active material having a surface mean diameter of the negative active material satisfying: lg(SMD−2)+lg(SMD+2)≥0.4. SMD is a value of the surface mean diameter of the negative active material measured in μm, and falls within a range of 10 to 16; and lg is a frequency. The negative active material enables the electrochemical device to achieve a trade-off between a high energy density and a low degree of lithium plating.