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:
Jul. 28, 2026
Filed:
Sep. 15, 2021
Ningde Amperex Technology Limited, Ningde City, CN;
Hui Cui, Ningde City, CN;
Wenqiang Li, Ningde City, CN;
Yali Xiong, Ningde City, CN;
Jianming Zheng, Ningde City, CN;
Ningde Amperex Technology Limited, Ningde, CN;
Abstract
An electrochemical device includes a positive electrode, a negative electrode, a separator, and an electrolyte, where the electrolyte contains a nitrile compound and transition metal ions, and satisfies 5≤A/B≤30000, where based on a molar mass of the electrolyte, a molar percentage of a cyano group in the electrolyte is A %, and based on a weight of the electrolyte, a weight percentage of the transition metal ions in the electrolyte is B %. The electrochemical device ensures that the cyano group and the transition metal ions in the electrolyte satisfy a specified relationship, to reduce leaching of the transition metal ions from a positive electrode active material and stabilize structural distortion of the positive electrode active material in a charge and discharge process, thereby improving high-temperature cycle performance and floating charge performance of the electrochemical device.