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 68
- Downloads 0
Development of communication models of wireless environment in emergency situations
<p>Two-point communication model of the wireless environment with one-beam and multi-beam propagation of radio waves were developed. The specified models make it possible to create various particular two-point communicat...
Development and substantiation of the technology for producing structured olives containing the encapsulated olive oil
<p>The technology of the production of structured olive containing the encapsulated olive oil was developed and substantiated. The technology is based on the structuring methods with the use of ionotropic polysaccharides...
Modeling of customeroriented construction project management using the gender logic systems
<p>The specificity of the feminine and masculine contexts of managing the customer needs in the construction project is highlighted. It is substantiated that the customer-oriented context of the gender logic systems of c...
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...
Development of measures to improve milk quality and safety during production
<p>The number of somatic cells in cow milk affects its quality indicators, grade and safety. The level of somatic cells in milk depends on the state of the udder in animals. That is why it is important to diagnose sub-cl...