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

Journal Article · Mon Aug 01 00:00:00 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), Vol. 141:8; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

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