Invention Grant
- Patent Title: Active material for negative electrode, negative electrode piece, and secondary battery
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Application No.: US16355416Application Date: 2019-03-15
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Publication No.: US11069892B2Publication Date: 2021-07-20
- Inventor: Yisong Su , Yongsheng Guo , Chengdu Liang
- Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
- Applicant Address: CN Ningde
- Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
- Current Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
- Current Assignee Address: CN Ningde
- Agency: Morgan, Lewis & Bockius LLP
- Priority: CN201610827228.7 20160918
- Main IPC: H01M4/00
- 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.
Public/Granted literature
- US20190296356A1 ACTIVE MATERIAL FOR NEGATIVE ELECTRODE, NEGATIVE ELECTRODE PIECE, AND SECONDARY BATTERY Public/Granted day:2019-09-26
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