The electrochemical performance of porous carbon nanofibers produced by electrospinning

Porous carbon nanofibers were prepared by electrospinning of mixed solutions of polyvinylalcohol/phenol formaldehyde and polyvinylalcohol/phenol formaldehyde/potassium carbonate,followed by stabilization and carbonization.The microstructure of the samples was studied by SEM and N2 adsorption/desorption.The electrochemical performance of these porous carbon nanofibers as electrodes of electrical double layer capacitors was investigated by cyclic voltammetry and constant current charge/discharge cycling.Results showed that the BET surface areas of as-prepared porous carbon nanofibers with and without potassium carbonate were 668 and 564 m2 · g-1,and their specific capacitances were 178 and 165 F · g-1 at a current density of 0.2 A · g-1,respectively.