| Autor: |
Fuentes-Pérez, M., Castrellón-Uribe, J., León-Silva, U., Hernández-Martínez, D., García-Carvajal, S., Nicho, M. E. |
| Předmět: |
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| Zdroj: |
Journal of Cluster Science; Oct2024, Vol. 35 Issue 7, p2571-2589, 19p |
| Abstrakt: |
In this work, the effect of heat treatment in the synthesis of vanadium pentoxide (V2O5) on its physicochemical properties was studied. Furthermore, the effect of liquid and viscous electrolytes based on lithium perchlorate (LiClO4) on the performance of electrochromic devices (ECDs) was evaluated using heat-treated V2O5 as electrochromic film. V2O5 was synthesized using the chemical bath technique. The V2O5 without and with heat treatment at 400 °C was characterized using FT-IR, UV-Vis, XRD, XPS, FESEM, AFM, and cyclic voltammetry (CV) techniques. Better physicochemical behavior was shown by the thermally treated V2O5, which is why it was used in the ECDs. Single ECDs were characterized using optical transmittance spectra, kinetic curves, and electrochemical impedance spectroscopy. A broadening of the absorption band towards the red and better electrochemical properties were observed when a thermal treatment was applied to the amorphous V2O5. A charge storage capacity of 1061.42 mC/cm2 was obtained for the crystalline V2O5 film (with heat treatment) compared to the charge storage capacity of 303.38 mC/cm2 obtained for the amorphous V2O5 film. A better distribution and decrease in grain size was observed for V2O5 with heat treatment. The CV curves showed higher stability of crystalline V2O5 compared to amorphous V2O5, even after several cycles and at different scan rates. A higher flow of ions between the working electrode and the counter electrode was achieved with the use of liquid electrolyte in the ECD, allowing a more efficient ECD with greater change in transmittance in the near-infrared region, compared to the use of viscous electrolyte. This research work contributes to the improvement of the physicochemical properties of V2O5. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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