Electrochemical behavior of zinc oxide-based porous carbon composite nanofibers as an electrode for electrochemical capacitors

Therefore, the ZnO-CCNFs showed higher capacitance (163 F g−1 at 1 mA cm−2) and energy density (20.80-14.80 W h kg−1 in the power density range of 400-20,000 W kg−1) than the control sample of carbon nanofibers (CNFs) in aqueous electrolyte. The combination of the high surface area of CNFs with the large capacity of surface functional groups such as N, O, and ZnO as the faradic electrode material affords the advantages of both the double layer capacitance and the pseudocapacitance, thereby offering potential applications for supercapacitors.