A study of physico-chemical characteristics of electrochromic Ni(OH)2-PVA films on fto glass with different deposition duration

Authors

DOI:

https://doi.org/10.15587/1729-4061.2021.242853

Keywords:

electrochromism, electrodeposition, nickel hydroxide, polyvinyl alcohol, deposition duration, coating thickness, adhesion

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 %

Author Biographies

Valerii Kotok, Ukrainian State University of Chemical Technology; Vyatka State University

PhD, Associate Professor

Department of Processes, Apparatus and General Chemical Technology

Senior Researcher

Competence Center "Ecological Technologies and Systems"

Vadym Kovalenko, Ukrainian State University of Chemical Technology; Vyatka State University

PhD, Associate Professor

Department of Analytical Chemistry and Chemical Technology of Food Additives and Cosmetics

Senior Researcher

Competence Center "Ecological Technologies and Systems"

Rovil Nafeev, State University of Telecommunications

PhD, Associate Professor

Department of Physics

Volodymyr Verbitskiy, National Pedagogical Dragomanov University; National Ecological and Naturalistic Center for Student Youth

Doctor of Pedagogical Sciences, Professor

Department of Medical, Biological and Valeological Basics of Life and Health Protection

Director

Olena Melnyk, Sumy National Agrarian University

PhD, Associate Professor, Senior Researcher

Research Coordination Office

Iryna Plaksiienko, Poltava State Agrarian University

PhD, Associate Professor

Department of Ecology, Sustainable Nature Management and Environmental Protection

Dmitry Sukhomlyn, University of Chemical Technolog

PhD, Associate Professor

Department of Physical Chemistry

Sergey Filonenko, Poltava State Agrarian University

PhD, Associate Professor

Department of Agriculture

Anatolii Kocherga, Poltava State Agrarian University

PhD, Associate Professor

Department of Agriculture

Natalia Makarchenko, University of Chemical Technology

PhD, Associate Professor

Department of Inorganic Substances and Ecology

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Published

2021-10-31

How to Cite

Kotok, V., Kovalenko, V., Nafeev, R., Verbitskiy, V., Melnyk, O., Plaksiienko, I., Sukhomlyn, D., Filonenko, S., Kocherga, A., & Makarchenko, N. (2021). A study of physico-chemical characteristics of electrochromic Ni(OH)2-PVA films on fto glass with different deposition duration. Eastern-European Journal of Enterprise Technologies, 5(12(113), 39–46. https://doi.org/10.15587/1729-4061.2021.242853

Issue

Vol. 5 No. 12(113) (2021): Materials Science

Section

Materials Science

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Copyright (c) 2021 Valerii Kotok, Vadym Kovalenko, Rovil Nafeev, Volodymyr Verbitskiy, Olena Melnyk, Iryna Plaksiienko, Dmitry Sukhomlyn, Sergey Filonenko, Anatolii Kocherga, Natalia Makarchenko

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