The relation between coloring and bleaching with hydrogen in tungsten oxide-based electrochromic devices: Step current analysis

M. Denesuk, J. P. Cronin, S. R. Kennedy, D. R. Uhlmann

Research output: Contribution to journalArticle

5 Scopus citations


The relationshin between hydrogen intercalation and deintercalation (coloring and bleaching) in an aqueous tungsten oxide-based electrochromic device is presented. The built-in potential and optical transmission of the device are measured under step-current conditions; both display a hysteresis which can be explained by a two-phase model in which intercalation occurs as the parallel, equipotential filling of the two phases, but where a deintercalation barrier associated with one of the phases imposes an asymmetry. The observed data are well explained by a corresponding equivalent circuit which allows for the prediction of deintercalation behavior from intercalation behavior with a single adjustable parameter, which represents the barrier to deintercalation.

Original languageEnglish (US)
Pages (from-to)2154-2158
Number of pages5
JournalJournal of the Electrochemical Society
Issue number6
StatePublished - Jun 1997


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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