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Ionics

, Volume 5, Issue 1–2, pp 80–85 | Cite as

Optically passive cerium containing counter-electrodes for electrochromic devices

  • F. Varsano
  • F. Decker
  • E. Masetti
Article

Abstract

Electrochemical and optical behavior of sputter deposited CeO2, 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. CeO2 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/cm2 for a 107 nm thick film and ranks Ce-V mixed oxide among the most promising materials for electrochromic devices.

Keywords

Titration Diffusion Coefficient Electronic Material Cerium CeO2 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© IfI - Institute for Ionics 1999

Authors and Affiliations

  • F. Varsano
    • 1
  • F. Decker
    • 1
  • E. Masetti
    • 2
  1. 1.University of Rome “La Sapienza” Chemistry Dep.RomaItaly
  2. 2.Thin Films Optics Lab.ENEA —CasacciaRomaItaly

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