Microwave-Assisted hybridised WO3/V2O5 rod shape nanocomposites for electrochemical supercapacitor applications

• Published in: Inorganic chemistry communications 2021-11, Vol.133, p.108927, Article 108927
• Main Authors: Latha, K., Anbuselvi, S., Periasamy, P., Sudha, R., Velmurugan, D.
• Format: Article
• Language: English
• Subjects: Energy storage and conversion; Hybrid composites; Supercapacitor; WO3/V2O5
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2021.108927

WO3/V2O5 nanocomposites were prepared by microwave assisted method and 6 wt% of WO3 loaded V2O5 nanocomposite showed well grown rod shape and highest capacitance of 386F/g in 1M H2SO4 electrolyte. The capacity retention analysis showed 104% over 5000 cycle with the 99% of Columbic efficiency. The prepared WO3/V2O5 nanocomposite would be suitable for energy storage deceives (supercapacitor) and photo catalyst for hydrogen production. [Display omitted] •Pure V2O5 and WO3/V2O5 nanocomposite were prepared by microwave assisted method.•Rod shape morphology was observed.•Pure V2O5 and WO3/V2O5 nanocomposite showed the maximum capacitance of 95F/g and 386F/g.•The capacitance retention was 104% with the 99% of Columbic efficiency. Electrochemical supercapacitors are prominent energy storage devices owing to their superior capacitive behaviour and matchless power and energy density with excellent cyclic stability. In this report, we have prepared the rod shape WO3/V2O5 nanocomposite by the microwave-assisted method. XRD analysis confirmed the rhombohedral and orthorhombic phase structure of V2O5 and WO3. Various functional groups associated with V2O5 and WO3 compounds were studied by FTIR spectrum. Surface and morphological image analysis demonstrated rod shape morphology. Surface area (22.798 m2/g), pore volume (0.137 cc/g) and particle size (18 nm) were analyzed by BET analysis. The pure V2O5 nanostructure exhibited maximum specific capacitance of 150F/g in 1 M H2SO4 electrolyte which was enhanced to 260, 265 and 386F/g respectively for various wt.% of WO3 added V2O5 nanocomposites. The long cyclic test showed 104 % of capacitance retention over 5,000 cycles with 99 % columbic efficiency.