A study of the effect of cycling modes on the electrochromic properties of Ni(OH)2 films
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 6, Issue 5
Abstract
<p>As a result of conducted studies, a series of electrochromic Ni(OH)<sub>2</sub> films were prepared using the cathodic template method under the same conditions. Prepared films have been used for comparison of regimes for coloration-bleaching cycling. Main qualitative characteristics were also evaluated – averaged absolute coloration degree, averaged irreversibility on bleaching and visual comparison in the colored state after cycling.</p><p>To compare the influence of different regimes, potentiodynamic, galvanostatic and complex regimes were proposed. For potentiodynamic regimes, different upper and lower potential limits were chosen. Initial current density for galvanostatic and complex regimes was chosen based on the results of the cyclic voltamperometry curve. Chosen current density was equal to the cathodic peak value on the fifth cycle of the cyclic voltamperometry curve recorded in the following regime: potential window [201–751 mV], scan rate 1 mV/s.</p><p>Coloration-bleaching cycling in different regimes revealed high effectiveness of potentiodynamic regimes which showed the highest coloration degree of the films. On the other hand, it was found that narrowing and widening of potential windows relative to optimal resulted in worse characteristics of electrochromic films. Galvanostatic regimes showed the most optimal results in terms of absolute coloration degree and time required for coloration/bleaching. Complex regimes demonstrated the worst results. Theses regimes resulted in significant irreversibility and average rate of coloration and bleaching.</p>Galvanostatic and complex regimes revealed the presence of two plateaus on the current density curves, which indicates the presence of both α-Ni(OH)<sub>2</sub> and β-Ni(OH)<sub>2 </sub>in electrochromic material
Authors and Affiliations
Valerii Kotok, Vadym Kovalenko
Keywords
Related Articles
- EP ID EP528277
- DOI 10.15587/1729-4061.2018.150577
- Views 74
- Downloads 0
Determination of parameters of the stochastic inventory management system in the conditions of economically-based shortage
<p>A methodical approach to determining the optimal parameters of a stochastic inventory management system in the context of an economically justified deficit that allows responding quickly to fluctuations in demand and...
Studying the influence of the intensity of mechanochemical activation on the process of steam conversion of coal
<p><em>We continue to study the process of converting coal into synthesis-gas under conditions of </em><em>aerosol nanocatalysis and reasonably expect would-be benefits of industrial technology. The advantages include a...
Modeling the process of microbial biofilm formation on stainless steel with a different surface roughness
<p>This paper reports a study into the process of<strong> </strong>bacteria adhesion to surfaces of different roughness depending on sizes and shapes. It was determined that at the surface of stainless steel with a rough...
Development of Niederreiter hybrid crypto-code structure on flawed codes
<p>The use of the Niederreiter modified crypto-code structure (MCCS) with additional initialization vectors (with many invalid positional vectors of the error vector and multiple positions of shortening the error vector)...
Computer modeling of water cleaning in wetland taking into account of suffosion ang colmatation
<p>The mathematical model of filtering with regard to colmatation and suffusion in the system bioplato-filter 2. This saturated porous medium is considered in terms of a complex heterogeneous system "fill"-"concentration...