Supercapacitor behavior and characterization of RGO anchored V2O5 nanorods

A review on graphene based transition metal oxide composites and its application towards supercapacitor electrodes

“…The energy density for V 2 O 5 is 31.25 Whkg −1 and 20.18 Whkg −1 and that for RGP/V 2 O 5 is 62.93 Whkg −1 and 40.36 Whkg −1 respectively at a scan rate of 5 and 10 Ag −1 [127]. The calculated power density for V 2 O 5 1.814 kWkg −1 and 2.075 kWkg −1 and that for RGO/V 2 O 5 is 1.862 kWkg −1 and 2.201 kWkg −1 [126,127].…”

“…The prepared V 2 O 5 and GO powders is taken in 1:1 ratio, the V 2 O 5 dissolved in distilled water then GO is added. The mixed solution is stirred at 80 °C until the solution fully evaporated [127], the obtain Nano composite is RGO/V 2 O 5 . The specific capacitance of RGO/ V 2 O 5 is 290 and 186 Fg −1 at a scanning rate of 5 and 10 Ag −1 respectively which is higher than that of bare V 2 O 5 which is 144 and 93 Fg −1 at same tracking rate [127].…”

“…Graphene-based materials are desirable because of their elevated theoretical volume ratio (2630 m 2 g −1 and electrical conductivity) [138] as electrode materials for super-capacitors. Numerous graphene-based materials with unique chemical structures and morphologies such as chemical-modified graphene [139], microwave enhanced graphite oxide [127] (MEGO) [140] and curved graphene [141] were studied as super-capacitor's electrode components. This large portion of microwave broadened graphite oxide (a-MBGO) of micro-and meso-porous that provides a big and available region to accommodate charges and thus increases the specific capacity of organic and ionic liquid electrolytes to obtain a remarkably elevated spectroscopy density.…”

Structural and Morphological Charactrization of Nd Doped V2o5 Nanorods

“…Since, the ionic radius of Nd 3+ is (0.98 Å) 1.44 times higher than that of the ionic radius of V 5+ ion (0.68 Å) and it was hard for Nd ion to replace the V 5+ ion in the lattice of V 2 O 5 due to the large disparity of their ion radius. This may be due to the diffusion of Nd element on the surface of V 2 O 5 and appear in the form of Nd 2 O 3 [11]. Collate to the XRD pattern of undoped V 2 O 5 , the peak intensities of Nd doped V 2 O 5 decreases and the width of the diffraction planes becomes widen, which suggests that the crystallite size of V 2 O 5 becomes lesser with Nd dopant percentage.…”

“…Also, the incorporation Nd 3+ ions are evidenced from the position of the main peaks of V 2 O 5 was slightly shifted to the lower 2θ values. This shift is provoked by the strain produced by the ionic radii of the Nd 3+ and V 5+ ions, respectively [11]. Further, at higher dopant percentage (6 and 8% of Nd), a small peak appeared at 2θ = 24.41° corresponding to neodymium oxide (Nd 2 O 3 )…”