|
Electrochromic device, in the \Especially in recent years, with the development of low-carbon economy, transmissive electrochromic device research and application development is rapid. In this paper, the current research focus electrochromic \V2O5 in improving ion storage capacity, while improving its optical modulation characteristics for electrochromic \In this paper, the sol - gel prepared V2O5-TiO2 composite ion storage electrode film. Using XRD, AFM, TG-DSC, FTIR, Raman, XPS, SEM and Hall effect measurement, cyclic voltammetry, electrochemical impedance spectroscopy, time current response, UV - visible light transmittance and absorption spectra of other test methods, for V2O5-TiO2 The structure and properties of composite films were analyzed and focuses on the TiO2 composite and heat treatment on the structure of the composite film morphology, stoichiometry, electrical properties, and optical properties of lithium-ion implantation and its impact on the performance of mechanisms. Experiments to determine the optimal composite sol hydrothermal process parameters, the molar ratio of compound and heat treatment conditions, and access to high-performance ion-storage electrode film. The results showed that: V2O5-TiO2 composite film is amorphous, and maintain the layered structure of V2O5, TiO2 in the form of an amorphous material uniformly dispersed in the body, TiO2 composite lead spacing of V2O5 has been reduced, reducing the its c-axis direction of the ordered structure; composite film having a relatively small particle size and surface roughness; TiO2 V2O5 film composite leading non-stoichiometric to a higher level, increase in the number of oxygen vacancies. Compared to pure V2O5 gel films, V2O5-TiO2 composite film has a higher ion storage capacity and stability, widening and improving the range of visible light transmittance and intensity. V2O5-TiO2 composite films significantly reduced cathodic coloration reaction, the change in transmittance to 3%, and the ion injection / extrusion state were fairly high visible light transmittance properties. By the late film heat treatment process control parameters, the lattice structure of the film, the surface morphology and particle structure, oxygen vacancy defects and band structure has a corresponding change to optimize the V2O5-TiO2 composite films electrical, electrochemical and optical properties. Prepared V2O5-(TiO2) 0.2 to obtain the best performance composite film, can be applied to the electrochromic \
|