Vanadium oxide nanorods as an electrode material for solid state supercapacitor

The electrochemical properties of metal oxides are very attractive and fascinating in general, making them a potential candidate for supercapacitor application. Vanadium oxide is of particular interest because it possesses a variety of valence states and is also cost effective with low toxicity and a wide voltage window. In the present study, vanadium oxide nanorods were synthesized using a modified sol-gel technique at low temperature. Surface morphology and crystallinity studies were carried out by using scanning electron microscopy, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy analysis. To the best of our knowledge, the as-prepared nanorods were tested with magnesium ion based polymer gel electrolyte for the first time. The prepared supercapacitor cell exhibits high capacitance values of the order of similar to 141.8 F g(-1) with power density of similar to 2.3 kW kg(-1) and energy density of similar to 19.1 Wh kg(-1). The cells show excellent rate capability and good cycling stability.

Automated summary

Metal oxides, particularly vanadium oxide, are attractive for supercapacitor applications due to their excellent electrochemical properties. In this study, vanadium oxide nanorods were successfully synthesized using a modified sol-gel technique at low temperature. The nanorods were characterized using various techniques, and were tested with a magnesium ion based polymer gel electrolyte for the first time. The prepared supercapacitor cell exhibited high capacitance, power density, and energy density, along with excellent rate capability and cycling stability.