Electrochemical deposition of porous VOx and MnO2 nanowires on stainless steel mesh for flexible supercapacitors
Porous vanadium oxide (VOx) and MnO2 nanowires were synthesized by an electrochemical deposition method using stainless steel mesh as substrate. The as-prepared porous VOx and MnO2 nanowire films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Raman spectroscopy. The cyclic voltammetry (CV) results show that the MnO2 nanowire film shows specific capacitance of 195, 170, 158, and 91 F g-1 at scan rates of 5, 10, 20, and 50 mV s-1, respectively. The porous VOx film displays specific capacitance of 152, 124, 99, and 76 F g-1 at scan rates of 5, 10, 20, and 50 mV s -1, respectively. The capacitance losses for the MnO2 nanowire film and the porous VOx film are only 5% and 10% for 1000 cycles, respectively.