The determination of electrolyte stability and conditions for electrochromic WO3 films deposition

Kotok, Valerii; Кovalenko, Vadym; Solovov, Vitalii; Yurlova, Olga

doi:10.15587/2312-8372.2017.105473

Cited by 3 publications

(1 citation statement)

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“…Long-term EC performance of WO 3 materials is found to be suffered from degradation due to the accumulation of trapped ions in the host structure. [42][43][44][45][46][47] To improve the stability, many modication methods have been reported, including tuning of the fabrication process, 48 optimizing periodicity and degree of crystallinity, 49 and varying of the lm thickness. 50 Wen et al reported that ion-trapping-induced degradation, which is commonly believed to be irreversible, can be successfully eliminated by constant current-driven de-trapping.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of amorphous WO₃on SnO₂–TiO₂inverse opal nano-framework for highly transparent, effective and stable electrochromic smart window

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Electrodeposition of amorphous WO₃on SnO₂–TiO₂inverse opal nano-framework for highly transparent, effective and stable electrochromic smart window

et al. 2019

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Non-Metallic Films Electroplating on the Low-Conductivity Substrates: The Conscious Selection of Conditions Using Ni(OH)₂Deposition as an Example

Kotok

Кovalenko

2019

J. Electrochem. Soc.

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Mathematical modelling was used to study the influence of different parameters on the distribution of current density during electrodeposition of low-conductivity films on high-resistance substrates (FTO, ITO etc.). Experimental data were used to model the deposition of non-conductive Ni(OH)2 film onto FTO glass. The influence of substrate resistance, polarization resistance, electrolyte concentration, and other parameters on the current density distribution over the electrode surface was analyzed. The analysis of modelling results revealed that the fundamental differences in the current density distribution during deposition of coatings in electroplating and deposition of low-conductivity films are due to the high resistance of the substrate in the latter case. It was found that the impact on the uniformity of the current density distribution was decreasing in the series “substrate resistivity – polarization resistance – electrolyte conductivity”. The results of the conducted modelling allowed formulating recommendations for electrochemical deposition of low-conductivity films uniformly distributed over the surface of the substrate with low conductivity. In this case, the use of diluted electrolytes was justified. The results of galvanostatic deposition of Ni(OH)2 films onto FTO glass (7.5 Ω/□, 2 × 2 cm) from 1М and 0.01М solutions of Ni(NO3)2 and the subsequent colorization proved the modelling results experimentally. The width of Ni(OH)2 film deposited from 1M solution was less than 1mm, while the coating was absent on the rest of the surface. Deposition from 0.01 solution resulted in a uniform film with complete coverage of the working electrode area.

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A Brief Overview of Electrochromic Materials and Related Devices: A Nanostructured Materials Perspective

et al. 2021

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Exactly 50 years ago, the first article on electrochromism was published. Today electrochromic materials are highly popular in various devices. Interest in nanostructured electrochromic and nanocomposite organic/inorganic nanostructured electrochromic materials has increased in the last decade. These materials can enhance the electrochemical and electrochromic properties of devices related to them. This article describes electrochromic materials, proposes their classification and systematization for organic inorganic and nanostructured electrochromic materials, identifies their advantages and shortcomings, analyzes current tendencies in the development of nanomaterials used in electrochromic coatings (films) and their practical use in various optical devices for protection from light radiation, in particular, their use as light filters and light modulators for optoelectronic devices, as well as methods for their preparation. The modern technologies of “Smart Windows”, which are based on chromogenic materials and liquid crystals, are analyzed, and their advantages and disadvantages are also given. Various types of chromogenic materials are presented, examples of which include photochromic, thermochromic and gasochromic materials, as well as the main physical effects affecting changes in their optical properties. Additionally, this study describes electrochromic technologies based on WO3 films prepared by different methods, such as electrochemical deposition, magnetron sputtering, spray pyrolysis, sol–gel, etc. An example of an electrochromic “Smart Window” based on WO3 is shown in the article. A modern analysis of electrochromic devices based on nanostructured materials used in various applications is presented. The paper discusses the causes of internal and external size effects in the process of modifying WO3 electrochromic films using nanomaterials, in particular, GO/rGO nanomaterials.

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The determination of electrolyte stability and conditions for electrochromic WO3 films deposition

Cited by 3 publications

References 20 publications

Electrodeposition of amorphous WO₃on SnO₂–TiO₂inverse opal nano-framework for highly transparent, effective and stable electrochromic smart window

Electrodeposition of amorphous WO₃on SnO₂–TiO₂inverse opal nano-framework for highly transparent, effective and stable electrochromic smart window

Non-Metallic Films Electroplating on the Low-Conductivity Substrates: The Conscious Selection of Conditions Using Ni(OH)₂Deposition as an Example

A Brief Overview of Electrochromic Materials and Related Devices: A Nanostructured Materials Perspective

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The determination of electrolyte stability and conditions for electrochromic WO3 films deposition

Cited by 3 publications

References 20 publications

Electrodeposition of amorphous WO3on SnO2–TiO2inverse opal nano-framework for highly transparent, effective and stable electrochromic smart window

Electrodeposition of amorphous WO3on SnO2–TiO2inverse opal nano-framework for highly transparent, effective and stable electrochromic smart window

Non-Metallic Films Electroplating on the Low-Conductivity Substrates: The Conscious Selection of Conditions Using Ni(OH)2Deposition as an Example

A Brief Overview of Electrochromic Materials and Related Devices: A Nanostructured Materials Perspective

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Electrodeposition of amorphous WO₃on SnO₂–TiO₂inverse opal nano-framework for highly transparent, effective and stable electrochromic smart window

Electrodeposition of amorphous WO₃on SnO₂–TiO₂inverse opal nano-framework for highly transparent, effective and stable electrochromic smart window

Non-Metallic Films Electroplating on the Low-Conductivity Substrates: The Conscious Selection of Conditions Using Ni(OH)₂Deposition as an Example