Preparation,characterization and capacitive capability of carbon-based composite nanofibers

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, phase composition, specific surface area and electrochemical property of the nanofibers, respectively. The result showed that the porous carbon material was C / Co / CNTs and its precursor had a smooth surface; and 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 210 F / g at current density of 1. 0 A / g. Also,its energy density and power density were 3. 1 W·h / kg and 2 337 W / kg at current of 0. 5 mA and 5 mA,respectively.