The relation between coloring and bleaching with lithium in tungsten oxide based electrochromic devices

Step current analysis

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

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

An analysis of Li-intercalation and deintercalation in a tungsten-oxide based electrochromic device is presented. An hysteresis between intercalation and deintercalation has been separately observed in both the built-in potential and the optical efficiency of the devices. This hysteresis is 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 the observed asymmetry. An equivalent circuit model is given, allowing for the prediction of the deintercalation behavior from the intercalation behavior with a single adjustable parameter (representing the deintercalation barrier). The observed data are well-explained by the circuit model; using a single adjustable parameter, an accurate description of the deintercalation behavior may be obtained from the data on intercalation.

Original languageEnglish (US)
Pages (from-to)1971-1979
Number of pages9
JournalJournal of the Electrochemical Society
Volume144
Issue number6
StatePublished - Jun 1997

Fingerprint

Electrochromic devices
tungsten oxides
bleaching
Coloring
Intercalation
Bleaching
Lithium
intercalation
Tungsten
lithium
Oxides
Hysteresis
hysteresis
equipotentials
equivalent circuits
Equivalent circuits
tungsten oxide
asymmetry
Networks (circuits)
predictions

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

The relation between coloring and bleaching with lithium in tungsten oxide based electrochromic devices : Step current analysis. / Denesuk, M.; Cronin, J. P.; Kennedy, S. R.; Uhlmann, Donald R.

In: Journal of the Electrochemical Society, Vol. 144, No. 6, 06.1997, p. 1971-1979.

Research output: Contribution to journalArticle

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