Electrochemical Deposition of Porous VO_x and MnO_2 Nanowires on Stainless Steel Mesh for Flexible Supercapacitors

摘要

Porous vanadium oxide (VO_x) and MnO_2 nanowires were synthesized by an electrochemical deposition method using stainless steel mesh as substrate. The as-prepared porous VO_x and MnO_2 nanowire films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Raman spectroscopy. The cyclic voltammetry (CV) results show that the MnO_2 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 VO_x 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 MnO_2 nanowire film and the porous VO_x film are only 5% and 10% for 1000 cycles, respectively.