▎ 摘　　要

NOVELTY - A multilevel pore structure of graphene fiber, where in the multilevel pore structure, the graphene fiber has outer diameter of 0.01-100 microns, the length-diameter ratio of 20:1-2000:1, and the specific surface area of 500-2800 m2/g. USE - As an electrode material in a super capacitor (claimed). ADVANTAGE - The method is simple, and the obtained product has high purity, complete structure, and improved mechanical strength. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing the multilevel pore structure of graphene fiber, involving placing inorganic template in a reactor, adding carrier gas, raising the temperature to 500-1200 degrees C; introducing a process gas containing carbon element, in the same temperature, and depositing on the inorganic template to obtain a mixture of carbon and inorganic template, where the reaction is carried out for 0.01-2 hours, closing the process gas, and then the hydrogen and the protection of the inert gas is reduced to room temperature; and taking out solid product, using 0.1-0.5 mol/liter hydrochloric acid or nitric acid at 5-90 degrees C, processing for 0.1-4 hours, then filtering and washing with de-ionized water until it is neutral, and drying to obtain the final product.