公开(公告)号：US11069892B2

公开(公告)日：2021-07-20

申请号：US16355416

申请日：2019-03-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yisong Su ,  Yongsheng Guo ,  Chengdu Liang

IPC: H01M4/00 ,  H01M4/60 ,  H01M10/04 ,  H01M4/137 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/02

Abstract: A negative electrode active material, a negative electrode plate and a secondary battery. The negative electrode active material comprises a chelating resin and a metal ion. The chelating resin comprises a polymer skeleton and a chelating functional group. The chelating functional group is fixedly connected to the polymer skeleton via a chemical bond. The metal ion is connected with the chelating resin by an ionic bond and/or a coordinate bond via the chelating functional group. The chelating resin further comprises a free small molecular compound containing the chelating functional group. In the chelating resin, a mass percentage of the free small molecular compound containing the chelating functional is less than or equal to 1%. The metal ion is a divalent or multivalent metal ion. When the negative electrode active material is applied to the secondary battery, the secondary battery can achieve both high coulombic efficiency and high cycle stability.