Abstract
Metal ion modification is considered to be an effective way to construct metal oxides with specific physical and chemical properties. In this paper, we prepare a tungsten oxide (WO3) film co-modified by Co-ion and Mo-ion to serve as the electrochromic material through a one-step electrodeposition method. The effect of electrodeposition time on film thickness, surface morphology and electrochromic properties is systematically studied as well. The results show that, compared with pure WO3 film, the surface morphology of the tungsten oxide film modified by Co-ion and Mo-ion (WO3: Co, Mo) is significantly different. The Co and Mo co-modified film possesses a higher transmission modulation (58.5% at 600 nm) and rapid switching speed (coloring and bleaching time are 2.7 s and 5.6 s, respectively), low impedance value and excellent cycle stability. The performance enhancement is mainly attributed to the coral-like structure of the membrane, which provides a larger specific surface area, more ion adsorption sites and faster ion diffusion. Therefore, this work provides a fast and low-cost method to prepare tungsten oxide electrochromic films co-modified with cobalt and molybdenum ions. At the same time, it also provides an idea to obtain films with different electrochromic properties by adjusting the film thickness.
Highlights
The ever-increasing energy demand has become the most severe challenge brought about by the rapid development of world economy
The current energy structure is still dominated by fossil energies
When a constant current electrodeposition started, a blue film was quickly deposited on the surface of the ITO glass
Summary
The ever-increasing energy demand has become the most severe challenge brought about by the rapid development of world economy. The current energy structure is still dominated by fossil energies (such as coal, oil, and natural gas). These traditional fossil energy reserves are limited and non-renewable, and their excessive consumption causes global environmental problems, such as climate warming [1,2,3,4,5]. There is an urgent need to reasonably improve energy efficiency and maintain a sustainable economic development [6,7]. Electrochromic technology provides a new solution for energy savings in modern buildings, which can adjust the visible light transmittance of glass and solar radiation energy according to the human will. A senior consultant in architectural science at Lawrence Berkeley National Laboratory, once pointed out that “electrochromic technology is the most promising dimming technology in architectural applications” [9]
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call