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. 24, 2024
Filed:
Mar. 15, 2021
Ningde Amperex Technology Limited, Fujian, CN;
Ye Lang, Fujian, CN;
Ningde Amperex Technology Limited, Ningde, CN;
Abstract
A positive electrode active material, including: a secondary particle formed from a primary particle. The secondary particle includes an inner part and an outer part that wraps the inner part. A ratio of an average particle size of primary particles in the outer part to an average particle size of primary particles in the inner part is G, and 1.1≤G≤10. The outer part is a region from an interface of the secondary particle to a surface of the secondary particle, and the inner part is a region from the interface of the secondary particle to a center of the secondary particle. The positive electrode active material in this disclosure improves cycle performance while ensuring good rate performance.