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a XRD pattern of hydrated WO2.5·2H2O where ▼, monoclinic WO3•2H2O; o, orthorhombic WO3•0.33H2O. b EDAX of sample hydrated WO2.5·2H2O film. c FTIR spectrum of the sample powder from hydrated WO2.5·2H2O. d SEM micrograph of hydrated WO2.5·2H2O film sample obtained by the interaction of Cu2O with peroxo tungsten complex solution
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This paper presents a comparative analysis of electrochromic properties of nonstoichiometric hydrated films CuWO3.7·2H2O, WO2.5·2H2O, and α-WO2.9·H2O obtained by combined electrochemical and chemical methods. The use of EDAX X-ray diffraction and UV VIS spectroscopy and the Smacula-Dexter equation helped to determine that of differences in spectral...
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Citations
Supercapacitors require efficient and environmentally friendly electrodes. This study investigates the promising potential of a tungsten oxide/silicon dioxide/tungsten oxide (WO 3 /SiO 2 /WO 3 ) thin film on a Cu substrate as an alternative to conventional metal oxide flexible electrodes. Motivated by the need for enhanced energy storage capabilities, the WO 3 /SiO 2 /WO 3 composite combines WO 3 high specific capacitance and electrochemical stability of WO 3 with improved mechanical durability and high surface area of SiO 2 , offering a synergistic solution to overcome electrode limitations. Utilizing the Radio Frequency (Rf) Magnetron Sputtering technique, the WO 3 /SiO 2 /WO 3 thin film is precisely deposited on a Cu flexible substrate without organic additives, conductive agents, binder chemicals, or substrate pre‐treatment. Electrochemical characterization reveals the film’s pseudocapacitive behaviour, facilitated by the SiO 2 interlayer, enabling influential adjustment of electrolyte ions within the electrode structure. The obtained high specific capacitances at various scan rates and current densities demonstrate the potential of the thin film for supercapacitor applications. This research highlights the nanosandwich WO 3 /SiO 2 /WO 3 thin film as a promising material for flexible energy storage and intelligent nanodevices, making it a noteworthy candidate for various flexible applications. The findings contribute to the development of efficient and environmentally friendly energy storage solutions.
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