Coloration dynamics of tungsten oxide based all solid state electrochromic device

Yongming Li, Yoshihiro Aikawa, Akira Kishimoto, Tetsuichi Kudo

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


An electrochromic thin film of amorphous WO3nH2O was fabricated by spin-coating a peroxo-polytungstate solution. Coloration and bleaching kinetics of the film in contact with a solid polymer electrolyte were investigated by a chrono-amperometric method using a cell, Li/Polymer/WO3nH2O, ITO. The transition currents were analyzed on the basis of a newly proposed theory for the diffusion-controlled current generated by a voltage step in such a cell without a reference electrode. It was found that both kinetics were controlled by the diffusion process and the chemical diffusion coefficients of lithium were, in common, about 5 × 10-12 cm2 s-1.

Original languageEnglish
Pages (from-to)807-812
Number of pages6
JournalElectrochimica Acta
Issue number6
Publication statusPublished - Apr 1994
Externally publishedYes


  • all solid state EC device
  • coloration dynamics
  • ion-conducting polymer
  • spin-coating
  • tungsten oxide

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry


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