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:
May. 26, 2026
Filed:
Mar. 29, 2022
Ningde Amperex Technology Limited, Ningde City, CN;
Ningde Amperex Technology Limited, Ningde, CN;
Abstract
A negative electrode material, including an oxygen-containing silicon material. In a Raman spectrum of the oxygen-containing silicon material, Irepresents a peak intensity at a corresponding peak position of 140 cm±10 cmin the Raman spectrum, Irepresents a peak intensity at a corresponding peak position of 470 cm±10 cmin the Raman spectrum, and Irepresents a peak intensity at a corresponding peak position of 510 cm±10 cmin the Raman spectrum; and 0<I/I<2, and 0≤I/I<5. In this way, after the electrochemical device containing the negative electrode material is cycled, all crystalline silicon is converted into non-crystalline silicon, thereby decreasing the volume change of the negative electrode material in the electrochemical device and improving the cycle performance and expansion performance of the electrochemical device.