Tungsten oxide-Prussian blue electrochromic system based on a proton-conducting polymer electrolyte

Journal Article · Mon Aug 01 04:00:00 EDT 1994 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2055061· OSTI ID:7186193

Ho, K C; Rukavina, T G; Greenberg, C B ^[1]

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1. PPG Industries, Inc., Pittsburgh, PA (United States). Glass Technology Center

A new solid-state electrochromic system is presented. It is transparent and is comprised of a tungsten oxide and Prussian blue (PB) thin film couple in combination with a proton-conducting, solid polymer electrolyte. This electrochromic system exhibits rapid and deep optical switching; characteristics of a complementary configuration, both electrochromic films color and bleach in phase. Complementary electrochromic cells with the tungsten oxide-PB couple have previously been based on Li[sup +] or K[sup +]-conducting electrolytes. A repetitively cycling cell has not previously been reported with a proton-conducting solid polymer electrolyte. The devices were operated at low applied voltages, +1.2 V to darken and [minus]0.6 V to bleach. Repeated reduction and oxidation of the current system over 20,000 cycles has been demonstrated, indicating a large number of switchings without great degradation or irreversible side reactions. The sustained, high overall coloration efficiency of the devices suggests the insertion/extraction of protons into and out of both WO[sub 3] and PB films. The effects of cell size and operating temperature on the switching response are discussed.

• OSTI ID: 7186193
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 141:8; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320107* -- Energy Conservation
Consumption
& Utilization-- Building Systems-- (1987-)
CHALCOGENIDES
CHEMICAL REACTIONS
COMPLEXES
COOLING LOAD
ELECTRICAL EQUIPMENT
ELECTRO-OPTICAL EFFECTS
ELECTROCHROMISM
ELECTROLYTES
EQUIPMENT
FERROCYANIDES
HEATING
IRON COMPLEXES
IRON COMPOUNDS
LIGHT TRANSMISSION
OPENINGS
OPERATION
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
REDOX REACTIONS
REFRACTORY METAL COMPOUNDS
SOLAR HEATING
SOLAR RADIATION
SOLID ELECTROLYTES
STELLAR RADIATION
SWITCHES
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
TUNGSTEN OXIDES
WINDOWS