Electrochromic NiOxHy, hydrated films: cyclic voltammetry and ac impedance spectroscopy in aqueous electrolyte

Gorenstein, A.; Decker, F.; Estrada, Walter; Esteves, Cátia I. C.; Andersson, A.; Passerini, Stefano; Pantaloni, S.; Scrosati, B.

doi:10.1016/0022-0728(90)85107-g

Cited by 46 publications

(9 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another significant development in this functionalization of electrode surface leading to electrochromism is electrode modification with thin surface films of nickel hydroxide (Carpenter et al 1987;Govenstin et al 1990;Joseph et al 1991). A platinum surface is electrochemically modified with a NiHCF film and then dipped in KOH or NaOH to obtain a stable nickel hydroxide film.…”

Section: Ga'amentioning

confidence: 99%

Molecular-level functionalization of electrode surfaces. An overview

Yegnaraman

1996

Formerly: Proceedings (Chemical Sciences)

View full text Add to dashboard Cite

Electrochemical reactions occur at electrode/electrolyte interfaces. Hence, manipulation and design of electrochemical interfaces accompanied by surface modifications have assumed vital importance. Molecular level modification, either at the monolayer or multilayer level of electrode surfaces and leading to functionalization of electrodes, is being actively pursued by researchers. Modification based on the self-assembled monolayer approach has enabled electrodes to acquire molecular recognition and molecular electronic characteristics. Functionalization of electrode surfaces using polymeric materials and enzymes has facilitated electrodes in exhibiting properties like catalysis, molecular recognition, electrochromism and birefringence. The results of such molecular level functionalization studies of electrode surfaces carried out recently in our laboratories are presented in this overview. Besides, some representative results reported from elsewhere are also included.

show abstract

Section: Ga'amentioning

confidence: 99%

Molecular-level functionalization of electrode surfaces. An overview

Yegnaraman

1996

Formerly: Proceedings (Chemical Sciences)

View full text Add to dashboard Cite

show abstract

“…Electrochromic WO 3 was attracted much attention due to its high coloring efficiency, high stability and low material cost. WO 3 and Ni oxide/hydroxides are currently in wide spread used as cathodic and anodic coloration materials, respectively [4][5][6]. The generally accepted electrochromic process for a WO 3 thin film to adopt the colored/bleached state, which is reversibly achievable by injection of electrons and ions, can be summarized by the following equation [7]:…”

Section: Introductionmentioning

confidence: 99%

Effect of Deposition Temperature on the Electrochromic Properties of Electron Beam-Evaporated WO₃ Thin Films

Wang

Wen

Chen

et al. 2014

Integrated Ferroelectrics

View full text Add to dashboard Cite

Tungsten oxide (WO 3 ) thin films were deposited on ITO/glass substrates using the electron beam evaporation technique. The WO 3 films were grown on substrates at temperatures varying from room temperature (RT) to 240 • C. The structural characterization and surface morphology were examined using X-ray diffraction (XRD) and a field emission scanning electron microscope (FE-SEM). The electrochromic properties of WO 3 thin films were investigated using cyclic voltammograms (CVs) and in situ transmittance measurements, which were performed on WO 3 thin films immersed in an electrolyte of 1 M LiClO 4 in propylene carbonate (PC). An amorphous 510-nm-thick WO 3 film heated at RT exhibits the maximum transmittance variation ( T%) of 61.8% between the bleached state and the colored state, with a OD of 0.739, Q of 17.31 mC/cm 2 and η of 42.69 cm 2 /C at a wavelength (λ) of 550 nm.

show abstract

“…11,12) It was considered that NiO thin films converted to Ni(OH) 2 in aqueous solutions, and transparent Ni(OH) 2 layers formed on NiO grains in electrolytes transformed to brown-color nickel oxyhydroxide (NiOOH) reversibly, showing the EC color change. 13,14) From a practical viewpoint, the direct formation of electrochemically-active Ni(OH) 2 thin films is desirable.…”

Section: Introductionmentioning

confidence: 99%

Reactive sputter deposition of β-Ni(OH)₂ thin films in Ar + H₂O mixed gas atmosphere at a substrate temperature of −80 °C

Abe

Kataoka

Yokoiwa

et al. 2023

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

Nickel hydroxide [Ni(OH)2] is an electrochemically-active material used for rechargeable batteries, electrochemical capacitors, and electrochromic devices. Although there have been some studies on nickel hydroxide thin films deposited by sputtering, the Ni(OH)2 formation has not been fully confirmed. In this study, a Ni metal target was reactively sputtered in atmospheres of O2 and Ar + H2O at substrate temperatures of room temperature (RT, around 20 °C), −80 °C, and −170 °C, and the aging treatment effects in the air at RT were studied. From optical, X-ray diffraction, and infrared absorption measurements, β-Ni(OH)2 thin films were found to be formed after aging the films deposited at −80 °C in Ar + H2O, however, NiO thin films were formed at RT. These results corresponded well with a thermodynamic consideration of Ni(OH)2. At −170 °C, mixed metal and oxide films were formed, presumably because of insufficient Ni oxidation.

show abstract

Electrochromic NiOxHy, hydrated films: cyclic voltammetry and ac impedance spectroscopy in aqueous electrolyte

Cited by 46 publications

References 23 publications

Molecular-level functionalization of electrode surfaces. An overview

Molecular-level functionalization of electrode surfaces. An overview

Effect of Deposition Temperature on the Electrochromic Properties of Electron Beam-Evaporated WO₃ Thin Films

Reactive sputter deposition of β-Ni(OH)₂ thin films in Ar + H₂O mixed gas atmosphere at a substrate temperature of −80 °C

Contact Info

Product

Resources

About

Electrochromic NiOxHy, hydrated films: cyclic voltammetry and ac impedance spectroscopy in aqueous electrolyte

Cited by 46 publications

References 23 publications

Molecular-level functionalization of electrode surfaces. An overview

Molecular-level functionalization of electrode surfaces. An overview

Effect of Deposition Temperature on the Electrochromic Properties of Electron Beam-Evaporated WO3 Thin Films

Reactive sputter deposition of β-Ni(OH)2 thin films in Ar + H2O mixed gas atmosphere at a substrate temperature of −80 °C

Contact Info

Product

Resources

About

Effect of Deposition Temperature on the Electrochromic Properties of Electron Beam-Evaporated WO₃ Thin Films

Reactive sputter deposition of β-Ni(OH)₂ thin films in Ar + H₂O mixed gas atmosphere at a substrate temperature of −80 °C