Excellent Electrochromic Properties of Ti<sup>4+</sup>-Induced Nanowires V<sub>2</sub>O<sub>5</sub> Films

oleh: Yufei Deng, Hua Li, Jian Liang, Jun Liao, Min Huang, Rui Chen, Yinggui Long, Jacques Robichaud, Yahia Djaoued

Format: Article
Diterbitkan: MDPI AG 2024-09-01

Deskripsi

Ti<sup>4+</sup>-doped V<sub>2</sub>O<sub>5</sub> films with nanowires on top and a dense, long nanorod layer on the bottom were successfully fabricated using the spin-coating route. During the electrochromic cycling, charge transfer resistance (<i>R<sub>ct</sub></i>) decreases while ion-diffusion ability (<i>K<sub>Ω</sub></i>) rapidly drops in the first ten cycles and then levels off. Low <i>R<sub>ct</sub></i> and morphology of nanowires collaboratively improved the electrochromic behavior of Ti<sup>4+</sup>-doped V<sub>2</sub>O<sub>5</sub> films by enhancing the charge transfer speed and minimizing polarization and dissolution. The obtained Ti<sup>4+</sup>-doped V<sub>2</sub>O<sub>5</sub> film shows better electrochromic properties than the undoped V<sub>2</sub>O<sub>5</sub> film, with a coloration efficiency (CE) of 34.15 cm<sup>2</sup>/C, coloration time of 9.00 s, and cyclic retention of 82.6% at cycle 100. In contrast, the corresponding values for the undoped V<sub>2</sub>O<sub>5</sub> film were 23.57 cm<sup>2</sup>/C, 13.16 s, and 43.6%.