TUNGSTEN-OXIDE PRUSSIAN BLUE ELECTROCHROMIC SYSTEM BASED ON A PROTON-CONDUCTING POLYMER ELECTROLYTE

被引:72
作者
HO, KC [1 ]
RUKAVINA, TG [1 ]
GREENBERG, CB [1 ]
机构
[1] PPG IND INC,CTR GLASS TECHNOL,PITTSBURGH,PA 15238
关键词
D O I
10.1149/1.2055061
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
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; characteristic 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+ or K+-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 -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 WO3 and PB films. The effects of cell size and operating temperature on the switching response are discussed.
引用
收藏
页码:2061 / 2067
页数:7
相关论文
共 58 条
[51]  
TADA H, 1987, ELECTROCHEMICAL SOC, P325
[52]  
TAKAHASHI Y, 1982, Patent No. 4350414
[53]  
TAKAHASHI Y, 1984, Patent No. 4433901
[54]  
UCHIKAWA K, 1987, Patent No. 4652090
[55]   EFFECT OF ACTIVE SURFACE-AREA ON THE RESPONSE-TIME OF ELECTROCHROMIC AND ELECTROLYTIC DISPLAYS [J].
VIENNET, R ;
RANDIN, JP ;
RAISTRICK, ID .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1982, 129 (11) :2451-2453
[56]  
YANO Y, 1990, ELECTROCHEMICAL SOC, P125
[57]  
YOSHIDA T, 1988, OCT EL SOC M CHIC, V88, P552
[58]  
1989, ASHRAE HDB, pCH27