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. 12, 2026
Filed:
Dec. 17, 2024
Contemporary Amperex Technology (Hong Kong) Limited, Hong Kong, CN;
Contemporary Amperex Technology (Hong Kong) Limited, Hong Kong, CN;
Abstract
A carbon material includes an external region and an internal region disposed on the inside of the external region, the external region being a region formed by extending for a distance of 0.25 L from the surface of the particles of the carbon material towards the interior of the particles, L being a short-axis length of the particles of the carbon material; total pore area of the external region being denoted as S1 and total pore area of the internal region being denoted as S2, and S2>S1. The carbon material can make the secondary battery have high initial columbic efficiency, high energy density and good cycling performance. A method for preparing the carbon material, and a secondary battery and an electrical device comprising the carbon materials are also provided.