Abstract
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 language | English (US) |
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Pages (from-to) | 2154-2158 |
Number of pages | 5 |
Journal | Journal of the Electrochemical Society |
Volume | 144 |
Issue number | 6 |
DOIs | |
State | Published - Jun 1997 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Materials Chemistry
- Surfaces, Coatings and Films
- Electrochemistry
- Renewable Energy, Sustainability and the Environment