PRODUCTION METHOD OF CARBON NANOFIBERS HAVING CHEMICAL STABILITY AND UNIFORM STRUCTURE THROUGH MECHANOCHEMICAL TREATMENT OF CATALYST

摘要

PURPOSE: Provided is a production method of carbon nanofibers having chemical stability and uniform structure through mechanochemical treating catalytic precursor, transition metal hydroxide, and carrier, metal hydroxide. CONSTITUTION: The catalyst supported on transition metal is produced by the following steps of: (i) preparing a transition metal-supported catalyst by mixing transition metal hydroxide such as nickel hydroxide, iron hydroxide or cobalt hydroxide and metal hydroxide, carrier, such as magnesium hydroxide or aluminum hydroxide, wherein transition metal hydroxide and metal hydroxide are mixed in a molar ratio of 1:0.1 - 1:10; (ii) reducing the transition metal-supported catalyst for 20-30min in H2 atmosphere. The carbon nanofibers are grown by flowing hydrocarbon gas such as ethylene, methane or propane into prepared transition metal-supported catalyst at 500-900deg.C and cooling carbon nanofibers at a 4deg.C/min rate in Ar atmosphere. The resultant carbon nanofibers having 100-200nm of diameter and stable structure are used as composites and electrode materials.