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:
Sep. 15, 2026
Filed:
Sep. 30, 2022
Dongguan Amperex Technology Limited, Dongguan City, CN;
DONGGUAN AMPEREX TECHNOLOGY LIMITED, Dongguan, CN;
Abstract
An electrochemical device includes a negative electrode plate and an electrolyte. The negative electrode plate includes a negative active material. A specific surface area of the negative active material is A m/g and 0.3≤A≤4. The electrolyte includes fluorocarboxylate and fluorocarbonate. Based on a mass of the electrolyte, a mass percent of the fluorocarboxylate is X % and a mass percent of the fluorocarbonate is Y %, 5≤Y≤70, and the electrochemical device satisfies 50≤X+Y≤85, and 6≤Y/A≤200. The synergy between the negative active material and the electrolyte can effectively improve cycle performance of the electrochemical device under high voltages, and alleviate lithium plating of the negative electrode.