Electrochemically co-deposited WO3-V2O5 composites for electrochromic energy storage applications

Tungsten and Titanium Oxide Thin Films Obtained by the Sol-Gel Process as Electrodes in Electrochromic Devices

“…Both the kinds of electrochromic devices are made by using amorphous WO 3 and crystalline TiO 2 electrodes, that as said above, represent the best device configurations studied during this work. The electrochromic devices made during this work, show values of CE quite competitive with respect to those obtained from systems described in the previous literature in which the optical properties are improved by common strategies such as metal oxide doping (Cai et al, 2013;Yun et al, 2019), composite formation (Prasad et al, 2022), and nanostructuring (Eyovge et al, 2021). Therefore, ours electrochromic devices are quite promising to be used as smart windows in saving energy applications.…”

Flexible Reflective Electrochromic Devices Based on V2O5-Methyl Cellulose Composite Films

“…50 As displayed in Figure 3c, the curves of VMC composite films retain the excellent shape of the redox peak under low-speed scanning and high-speed scanning, indicating that a steady state exists of Li + transport into and out of interlayer channels. 51,52 The oxidation peak currents and reduction peak currents of VMC approximately showed a linear relationship with a function of the scan rate, 53 as showcased in Figure 3d. The larger the scanning rate, the greater the polarization degree of the VMC composite film, which can be seen from the difference in the redox peak, and the larger the difference, the more obvious the polarization phenomenon, which is manifested in the positive shift of the oxidation peak potential and the negative shift of the reduction peak potential.…”

“…The former is because the interlayer spacing is further expanded with the insertion of Li + into the VMC lattice, which can subsequently accommodate more ions to pass through at the same time, and the latter is a fit to the disappearance of one redox peak . As displayed in Figure c, the curves of VMC composite films retain the excellent shape of the redox peak under low-speed scanning and high-speed scanning, indicating that a steady state exists of Li + transport into and out of interlayer channels. , The oxidation peak currents and reduction peak currents of VMC approximately showed a linear relationship with a function of the scan rate, as showcased in Figure d. The larger the scanning rate, the greater the polarization degree of the VMC composite film, which can be seen from the difference in the redox peak, and the larger the difference, the more obvious the polarization phenomenon, which is manifested in the positive shift of the oxidation peak potential and the negative shift of the reduction peak potential. , In this case, the electrochromic process is controlled by diffusion, and the ionic diffusion coefficient is basically unchanged.…”

Application of Tungsten-Oxide-Based Electrochromic Devices for Supercapacitors

“…ECSCs fabricated on flexible substrates have great application prospects, while ECSCs on rigid substrates can obtain very high device parameters [87][88][89][90][91][92][93]. Prasad [94] mixed tungsten oxide (WO 3 ) and vanadium oxide (V 2 O 5 ) to prepare an ECSC. The optical contrast of the device was 60%, the fast color response was 4.9 s, and the highest color efficiency was 61.5 cm 2 /C.…”