Electrochemical investigation of hybridized wo3xx cds zns v2o5 nanocomposites prepared by icrowave assisted wet chemical method for supercapacitor application

Abstract

Nowadays, scientific research is focusing to sustain the balance between energy demands and supply. Energy storage method has now become the foremost factor in economic development with the introduction of electricity and fuels. Besides, fossil fuels are exhausting at very fast and continuous usage of fossil fuels silently increased the CO2 gas in our atmosphere which leads to global warming. The scientific people are focusing on the advanced energy conversion and energy systems in the electrical division as fuel cells, batteries and supercapacitors, etc. Nanostructures that are derived from various sources such as metal oxide semiconductors, polymers, activated carbon, and biowaste materials have been investigated by many researchers and reached some remarkable milestone in the energy harvesting and storing field. The electrochemical supercapacitor is one of the most investigated energy storage devices. The different dimensions of devices have been fabricated which are now in regular practice in many places. In this study, the hybridized electrode materials (WO3 and WO3- CdS, WO3-ZnS, WO3-V2O5) are synthesized by the environmental friendly microwave assisted wet chemical method and investigated its electrochemical performance in 1 M H2SO4 and 20 % KOH electrolyte. The pure WO3 nanostructures are prepared for the different time of microwave irradiation such as 10, 20, and 30 mins. The short time (10 mins) microwave irradiated WO3 nanostructure has shown rod shape morphology with the better porous site which supported to achieve a high specific capacitance of 246 F/g in 1 M H2SO4. Similarly, the different weight percentage of CdS ( 2 wt.%, 4 wt.% and 6 wt.%) was loaded with WO3 to prepare hybridized WO3-CdS nanocomposite and 6 wt.% CdS loaded composite has shown excellent specific capacitance of 650 F/g in 1 M H2SO4 and 172 F/g in 20 % KOH electrolyte. newline