Dip-coated TiO2CeO2 films as transparent counter-electrode for transmissive electrochromic devices

Baudry, Paul; Rodrigues, Ana Cândida Martins; Aegerter, Michel A.; Bulhões, L.O.S.

doi:10.1016/0022-3093(90)90151-b

Cited by 135 publications

(54 citation statements)

References 6 publications

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“…[40] CeO 2 /TiO 2 shows excellent optical properties as a passive counter electrode, and can be fabricated by a sol±gel process. [41,42] The dipcoating of a sol with subsequent annealing could be a viable way of producing large-area coatings for windows. However, the long-term stability of the combination of CeO 2 /TiO 2 with PEDT/PSS must first be successfully demonstrated.…”

Section: Feature Articlementioning

confidence: 99%

Electrochromic Window Based on Conducting Poly(3,4-ethylenedioxythiophene)-Poly(styrene sulfonate)

Heuer¹,

2002

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A short survey of technological aspects of electrochromism with various electroactive species is given. Different approaches with inorganic and organic materials have been pursued in the past. So far widespread usage of this technology for large area applications has not been achieved. Nevertheless one major technical product, self‐darkening rear‐view mirrors for cars, is already well established. This article reviews some research results on electroactive polythiophenes, especially poly(3,4‐alkylenedioxythiophenes). Some promising results with the commercially available electrically conducting polymer Baytron P (PEDT/PSS) are presented. It is demonstrated that an all solid‐state electrochromic multilayer assembly based on a polymeric electrochromic material might be close to technical realization. The coating of large area substrates with aqueous poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) dispersion can be a way to an economically viable product.

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Section: Feature Articlementioning

confidence: 99%

Electrochromic Window Based on Conducting Poly(3,4-ethylenedioxythiophene)-Poly(styrene sulfonate)

Heuer¹,

2002

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“…20 mC/cm 2 for (280 nm thick film) have been reported for films made with the same sols precipitated by adding NH 4 OH (pH = 9) followed by HNO3 peptization [38]. CeO2-TiO2 coatings, first reported by Baudry et al [40,[41][42][43][44][45][46], show better electrochemical properties. 20 mC/cm 2 can be inserted reversibly in equimolar mixed oxide films fired at 450~ [40,46].…”

Section: (Degree)mentioning

confidence: 91%

“…CeO2-TiO2 coatings, first reported by Baudry et al [40,[41][42][43][44][45][46], show better electrochemical properties. 20 mC/cm 2 can be inserted reversibly in equimolar mixed oxide films fired at 450~ [40,46]. The coatings are composed of small CeO2 crystallites (~1 to 5 nm) imbedded in an amorphous and porous TiO2 matrix which acts as a continuous structure for the Li + ions to reach the surface of each crystallite.…”

Section: (Degree)mentioning

confidence: 96%

Electrochromism in materials prepared by the sol-gel process

Aegerter

Avellaneda

Pawlicka

et al. 1997

J Sol-Gel Sci Technol

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Abstract. Electrochromism is defined as the persistent but reversible optical change (usually transmission) produced electrochemically. The preparation by the sol-gel process of thin films made of amorphous or crystalline nanoparticles of WO3, V205, Nb205, TiO2, CeO2, Fe203 and mixed compounds such as WO3-TiO2, CeO2-TiO2, CeO2-SnO2, have opened remarkable new opportunities for obtaining electrochromic layers exhibiting large optical transmission variation in the UV, visible or infrared range and acceptable kinetics under H + or Li + insertion. In this paper we give an overview of what has been recently achieved in this field, with emphasis for cathodic electrochromic coatings of Nb205 and TiO2 composition. Finally we stress the future developments in this fast growing field.

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“…This suggested its use as a passive counter-electrode in electrochromic windows, where it serves both as an UV shield and as an ion storage compound. Nevertheless, Li intercalation reaction is slow and a diffusion coefficient for Li as small as 5.10 -15 cmZs "1 was reported [8]. Baudry et al suggested that the limiting step is the diffusion of lithium into the electrode material due to the big distance among insertion sites of the cubic CeO2 structure compared to the small Li ion radius.…”

Section: Introductionmentioning

confidence: 97%

Optically passive cerium containing counter-electrodes for electrochromic devices

Varsano

Decker

Masetti

1999

Ionics

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Abstract.Electrochemical and optical behavior of sputter deposited CeO 2, Ce-Zr mixed oxide and Ce-V mixed oxide thin films are reported. The films were deposited starting from a target prepared by mixing and weakly pressing the oxide powders in the desired molar ratio. Li intercalation was accomplished from a liquid electrolyte. CeO 2 and Ce-Zr mixed oxide thin films are transparent in the visible range and behave as passive material upon oxidation/ reduction. During the cyclic voltammetries performed on the thin films a charge of few mC was reversibly cycled. The diffusion coefficient was evaluated from galvanostatic intermittent titration technique (GITT) experiments.Ce-V mixed oxide thin films showed a mixed anodic/cathodic behavior passing through a transparent state. The charge reversibly inserted during cyclic voltammetry at 10 mV/s was as high as 22 mC/cm 2 for a 107 nm thick film and ranks Ce-V mixed oxide among the most promising materials for electrochromic devices.

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Dip-coated TiO2CeO2 films as transparent counter-electrode for transmissive electrochromic devices

Cited by 135 publications

References 6 publications

Electrochromic Window Based on Conducting Poly(3,4-ethylenedioxythiophene)-Poly(styrene sulfonate)

Electrochromic Window Based on Conducting Poly(3,4-ethylenedioxythiophene)-Poly(styrene sulfonate)

Electrochromism in materials prepared by the sol-gel process

Optically passive cerium containing counter-electrodes for electrochromic devices

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