Carbon material comprising particles with pore structures, method for preparing the same, and secondary battery and electrical device comprising the same

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.

Dependencies are inferred from the claim text.