Abstract
The use of electrochromic elements in “smart” windows leads to significant savings in electricity required for cooling premises. However, the high cost of these devices does not allow the technology to be widely used. Since the cost is determined by costly vacuum deposition methods, the development of other cheaper methods of deposition of electrochromic element layers is urgent. Aspects of alternative to vacuum formation methods – cathode template electrochemical deposition of composite electrochromic Ni(OH)2-PVA films were investigated. The study is devoted to determining the effect of the duration of deposition of the electrochromic layer on their physicochemical characteristics, in particular, on the optical and electrochemical properties. The deposition was carried out on fluorine-doped tin oxide glasses (FTO glasses). The time of deposition was chosen equal to 5, 10, 20, 40, 60, and 80 minutes. As a result of the experiments, it was shown that the optimal duration of deposition under the selected conditions of the electrochromic layer formation was the interval from 5 to 20 minutes, inclusive. The deposition time of 40 minutes did not improve the optical characteristics of the film. At the same time, with the deposition duration of 60 and 80 minutes, the electrochemical and optical parameters sharply decreased, the coloration depth and irreversibility during bleaching, as well as the specific capacitances of the processes decreased. In the course of data processing, the film thickness was calculated depending on the duration of deposition in several ways. Comparison of the graphs obtained made it possible to determine the approximate amount of polyvinyl alcohol in the electrochromic composite coating, as well as to estimate the current efficiency of the electrodeposition and oxidation-reduction process of the electrochromic material. In this case, the volume of polyvinyl alcohol in the composite was approximately equal to the volume of nickel hydroxide, and the efficiency of Ni(OH)2 deposition and coloration-bleaching processes was approximately 100 %
Highlights
Electrochromism, the phenomenon of color change of substances under the influence of electric current, has been studied for a long time [1, 2]
Only relatively recently, electrochromic devices began to be widely used for the manufacture of “smart windows” for buildings [3], as an adjustable car tinting [4], for shading windows in aviation [5]
In [6] it is noted that the use of electrochromic “smart windows” can lead to energy savings during air conditioning up to 49 %, reduce the load on the power grid during “peak” periods of consumption up to 16 %
Summary
Corresponding author PhD, Associate Professor Department of Processes, Apparatus and General Chemical Technology*. PhD, Associate Professor Department of Analytical Chemistry and Chemical Technology of Food Additives and Cosmetics*. Doctor of Pedagogical Sciences, Professor Department of Medical, Biological and Valeological Basics of Life and Health Protection. National Pedagogical Dragomanov University Pyrohova str., Kyiv, 9, Ukraine, 01601 Director. National Ecological and Naturalistic Center for Student Youth Vyshhorodska str., 19, Kyiv, Ukraine, 04074. Sumy National Agrarian University Herasyma Kondratieva str., 160, Sumy, Ukraine, 40000. PhD, Associate Professor Department of Ecology, Sustainable Nature Management and Environmental Protection***. PhD, Associate Professor Department of Inorganic Substances and Ecology* *Ukrainian State University of Chemical Technology. Gagarina ave., 8, Dnipro, Ukraine, 49005 **Competence Center “Ecological Technologies and Systems”. ***Poltava State Agrarian University Skovorody str., 1/3, Poltava, Ukraine, 36003.
Sign-in/Register to view highlights & summary 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 callMore From: Eastern-European Journal of Enterprise Technologies
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
