CARBON MATERIAL, METHOD FOR PREPARING THE SAME, AND SECONDARY BATTERY AND ELECTRICAL DEVICE COMPRISING THE SAME

The present application provides a carbon material, a method for preparing the same, and a secondary battery and an electrical device comprising the same. The 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 Sand total pore area of the internal region being denoted as S, and S>S. The carbon material provided in the present application can make the secondary battery have high initial columbic efficiency, high energy density and good cycling performance.