▎ 摘　　要

NOVELTY - A carbon fiber comprises a coaxial stacking morphology of truncated conical tubular graphene layers. Each layer includes a hexagonal carbon layer (10) and has a large ring end at one end and a small ring end at the other end in an axial direction. At least part of edges of the hexagonal carbon layers is exposed at the large ring ends. USE - The carbon fiber is for mixing with resin or metal base material to form a composite (claimed). It may be used as an anode material or additive to the anode material of a lithium ion battery. ADVANTAGE - The carbon fiber has a high degree of surface activity. It exhibits good adhesion to resins. Heat treatment at at least2500degreesC provides no graphitization of the carbon fiber and no disappearance of the D peak (1360 cm-1) in the Raman spectrum. DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of an enlarged transmission electron micrograph of a carbon fiber having a herring-bone structure manufactured using a vapor growth process. Hexagonal carbon layer (10)