研究目的
Investigating the electrochemical supercapacitor performance of hybridized WO3-V2O5 nanocomposites in KOH and H2SO4 electrolytes.
研究成果
The rod shape WO3-V2O5 composites have showed enhanced specific capacitance in KOH electrolyte from 44 F/g to 172 F/g. The cyclic stability test exhibited the capacitance retention of ?126% up to 5000 cycles. The observed results were supported the WO3-V2O5 composite as the candidate material for a practical approach of supercapacitor application.
研究不足
The specific capacitance of WO3-V2O5 composites showed poor performance in H2SO4 electrolyte, less than 12 F/g, which could be attributed to the corrosion of the electrode material and high diffusion resistance faced by the ions.
1：Experimental Design and Method Selection:
Microwave assisted wet chemical route was used to prepare rod shape WO3-V2O5 hybrid nanocomposites.
2：Sample Selection and Data Sources:
Fresh
3：1M of sodium tungstate solution and 1M of ammonium metavanadate solution were prepared. List of Experimental Equipment and Materials:
Domestic microwave oven, muffle furnace, X-ray diffraction technique (XRD, model: PANalytical X’pert Pro), high-resolution transmission electron microscope (HRTEM, model: FEI USA, FP-5022), Energy dispersive absorption spectroscopy (EDAX, Model: EDAX-EDS-SSD), potentiostat-galvanostat electrochemical workstation (Model: PGSTAT-30 Metro Ohm, Auto lab).
4：Experimental Procedures and Operational Workflow:
The solutions were placed in a domestic microwave oven for 10 min microwave irradiation, dried on a hot plate, and heated at 200°C in a muffle furnace for 4 hours.
5：Data Analysis Methods:
The electrochemical analysis was performed in the potentiostat-galvanostat electrochemical workstation.
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