TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: A reaction temperature of the pyrolysis reaction is 800-1300 degrees C. A graphitization temperature of the high-temperature graphitization treatment is 2800-3000 degrees C. Preferred Components: The hydrocarbon compound comprises an aliphatic hydrocarbon compound, and/or an aromatic hydrocarbon compound. The aliphatic hydrocarbon comprises methane, ethylene, styrene, acetylene, propane, liquefied petroleum gas, butane, butene, and/or butadiene. The aromatic hydrocarbon comprises benzene, toluene, xylene, and/or styrene. The transition metal compound catalyst is ferrocene, and is present in an amount of 0.1-10 wt.%. The coordinating ligand containing the keto-enol tautomerism is ethyl 3-oxobutanoate, and is present in an amount of 0.5-5 wt.%. The organic compound containing the polysulfide group: has a molecular structure containing at least three sulfur atoms; is bis(dimethylthiocarbamoyl)sulfide; and is present in an amount of 0.1-2 wt.%. The bicyclic organic compound containing nitrogen: has a molecular structure containing at least one nitrogen atom; is triethylenediamine; and is present in an amount of 0.1-2 wt.%.R = 1-6C-alkyl.Preferred Composition: The VGGF composition has a water content of less than 0.2 wt.%; and a metal content of less than 200 ppm. A thermal decomposition onset temperature of the VGGF composition is greater than 700 degrees C, When a thermogravimetric analyzer (TGA) is used for analysis under test conditions including a temperature increasing rate of 10 degrees C/minute and an air flow rate of 10-20 ml/minute.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: An averaged outer diameter of the fibrous VGGF is 50-200 nm, and an averaged aspect ratio of the fibrous VGGF is 10-5000. The non-fibrous carbon is connected to, overlapped with or separated from the fibrous VGGF. The fibrous VGGF comprises an elongated hollow multi-layered structure formed by wrapping graphite having a carbon hexagonal net plane.