Journal of Materials Chemistry A, 2013, Vol.1(7), pp.2588-2594
-MoO 3 nanobelts were successfully prepared by a facile hydrothermal method with sodium molybdate (Na 2 MoO 4 ) as the Mo source and NaCl as the capping agent. The as-prepared products were characterized using Fourier transformation infrared spectrophotometry (FT-IR), X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and selected area electronic diffraction (SAED) and their pseudocapacitive properties were investigated in a 0.5 M aqueous Li 2 SO 4 solution by cyclic voltammetry (CV), chronopotentiometry (CP) and AC impendence. The results show that the dimensions of the as-prepared -MoO 3 nanobelts are 200400 nm in width, ca. 60 nm in thickness and 38 m in length. The redox potential for the -MoO 3 nanobelts is found in the range of 0.3 to 1.0 V vs. SCE, which indicates that the -MoO 3 nanobelts can be used as anode electrode materials for hybrid supercapacitors. The specific capacitances of the -MoO 3 nanobelts at 0.1, 0.25, 0.5 and 1 A g 1 are 369, 326, 256 and 207 F g 1 , respectively. The maximum specific capacitance of the -MoO 3 nanobelts is much higher than those of MoO 3 nanoplates with 280 F g 1 , MoO 3 nanowires with 110 F g 1 and MoO 3 nanorods with 30 F g 1 recently reported in literature. Furthermore, the -MoO 3 nanobelt electrode exhibits a good cycle stability with more than 95% of the initial specific capacitance maintained after 500 cycles. Additionally, the present route to prepare nanostructured MoO 3 is much less expensive than those with Mo powders as the Mo source. Overall, the obtained high performance -MoO 3 nanobelts could be a promising electrode material for supercapacitors.
Supercapacitors ; Scanning Electron Microscopy ; Electrode Materials ; Capacitance ; Diffraction ; Electronics ; Capacitors ; Nanostructure ; Thin Films, Surfaces, and Interfaces (So) ; Chemical and Electrochemical Properties (MD) ; Chemical and Electrochemical Properties (Ep) ; Chemical and Electrochemical Properties (Ed) ; Chemical and Electrochemical Properties (EC);