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:
Feb. 17, 2026
Filed:
Jun. 28, 2023
Ningde Amperex Technology Limited, Fujian, CN;
Zhihuan Chen, Ningde, CN;
Daoyi Jiang, Ningde, CN;
NINGDE AMPEREX TECHNOLOGY LIMITED, Ningde, CN;
Abstract
A negative electrode plate includes: a current collector; and an active material layer, located on the current collector. The active material layer includes a silicon-based material, a carbon material, and a binder. Silicon mass fractions in two places of the active material layer are Xand X; the two places cover a same area but are located in different positions, X≥X, M=X/X, and M≥0.7. Lithium mass fractions in the two places are Yand Y, respectively; the two places cover the same area but are located in different positions, Y≥Y, N=Y/Y, and N≥0.5. Also, uniformity of deintercalation and intercalation of lithium is enhanced by improving the dispersion uniformity of silicon in the active material layer, thereby alleviating volume expansion of the silicon-based material during cycling, and enhancing cycle performance and safety performance of the electrochemical device.