Enhanced electrochromic properties of TiO2 nanoporous film prepared based on an assistance of polyethylene glycol

1st International Conference on New Material and Chemical Industry

材料科学;化学工业

Xu, Shunjian^1 ; Luo, Xiaorui^1 ; Xiao, Zonghu^1 ; Luo, Yongping^1 ; Zhong, Wei^1 ; Ou, Hui^1 ; Li, Yinshuai^1

Xinyu Institute of New Energy, Xinyu University, Xinyu

338004, China^1

关键词: Diffuse reflection;    Electrochemical activities;    Electrochromic performance;    Electrochromic properties;    Fluorine doped tin oxide;    Pore-forming agents;    TiO2 nano-particles;    UV-Vis spectrophotometers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/167/1/012034/pdf
DOI  :  10.1088/1757-899X/167/1/012034

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Polyethylene glycol (PEG) was employed as pore-forming agent to prepare TiO2nanoporous film based on spin-coating a TiO2nanoparticle mixed paste on fluorine doped tin oxide (FTO) glass. The electrochromic and optical properties of the obtained TiO2film were investigated by cyclic voltammetry (CV), chronoamperometry (CA) and UV-Vis spectrophotometer. The results show that the PEG in the mixed paste endows the TiO2film with well-developed porous structure and improves the uniformity of the TiO2film, which are helpful for the rapid intercalation and extraction of lithium ions within the TiO2film and the strengthening of the diffuse reflection of visible light in the TiO2film. As a result, the TiO2film derived from the mixed paste with PEG displays higher electrochemical activity and more excellent electrochromic performances compared with the TiO2film derived from the mixed paste without PEG. The switching times of coloration/bleaching are respectively 10.16/5.65 and 12.77/6.13 s for the TiO2films with PEG and without PEG. The maximum value of the optical contrast of the TiO2film with PEG is 21.2% while that of the optical contrast of the TiO2film without PEG is 14.9%. Furthermore, the TiO2film with PEG has better stability of the colored state than the TiO2film without PEG.