The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 30, 2025
Filed:
Nov. 15, 2024
Contemporary Amperex Technology (Hong Kong) Limited, Hong Kong, CN;
Wenlong Bai, Ningde, CN;
Yiyang Wu, Ningde, CN;
Baozhen Wu, Ningde, CN;
Yonghuang Ye, Ningde, CN;
Xingyan You, Ningde, CN;
Yuwen Wang, Ningde, CN;
Wei Zheng, Ningde, CN;
Kai Wu, Ningde, CN;
Contemporary Amperex Technology (Hong Kong) Limited, Hong Kong, CN;
Abstract
The present application provides a composite negative electrode active material and a preparation method therefor, a negative electrode plate comprising same, a secondary battery and a power consuming device. The composite negative electrode active material comprises a negative electrode active material substrate and a conductive polymer layer on the surface of the negative electrode active material substrate, wherein the cyclic voltammetry curve of the composite negative electrode active material has an oxidation peak within a range of 3.2 V-3.6 V and a reduction peak within a range of 2.1 V-2.6 V. The composite negative electrode active material provided by the present application can combine a low volume expansion, a high capacity per gram and a high initial coulombic efficiency, thus enabling a secondary battery to combine a low volume expansion, a high energy density and a long cycle life.