▎ 摘　　要

NOVELTY - The electrode material comprises a carbon fiber which includes a coaxial stacking morphology of truncated conical tubular graphene layers (10). Each layer includes a hexagonal carbon layer and has a large ring end at one end and a small ring end at the other end in an axial direction. The edges of the carbon layers are exposed at the large ring ends. USE - For electric double layer capacitor (claimed) for backup power supply for PC memory, secondary battery, electric vehicle battery, fuel cell battery, hybrids. ADVANTAGE - The carbon fiber with small diameter and the exposed edges of the carbon layers, with extremely minute irregularities at the level of atoms on the surface, increase specific surface area, thereby increasing capacitance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for electric double layer capacitor. DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the carbon fiber. Truncated conical tubular graphene layers (10)