Abstract: PAN/Co(OAc)2/CNTs composite nanofibers were fabricated via electrospinning with DMF as solvent, and by carbonization and activation of the above precursor nanofibers, porous carbon composite nanofibers were successfully obtained. SEM, XRD, ASAP 2020 and Solartron 1470 were used to characterize the surface morphology, the phase composition, specific surface area and electrochemical propertiy of the nanofibers. The result showed that some of the fibers were broken after sintering, and the surface area and pore volume of the porous C/Co/CNTs were 771 m2/g and 0.347 cm3/g, respectively. The specific capacitance of the composite nanofibers reached up to 210 F/g at the current density of 1.0 A/g. Also, its energy density and power density were 3.1 Wh/Kg and 2337 W/Kg at current of 0.5 mA and 5 mA, respectively.

Key words: electrospinning, carbon nanotube, specific capacitance, electrochenical property, nanofiber