CONSTANT PHASE-ANGLE BEHAVIOR OF SNO2/WO3 THIN-FILM ELECTRODES IN ANHYDROUS LICLO4-PROPYLENE CARBONATE ELECTROLYTE

被引：18
作者：
BOHNKE, C
BOHNKE, O
VUILLEMIN, B
机构：
[1] Laboratoire d'Electrodimie des Solides U.A., 436, U.F.R. des Sciences et Techniques
来源：
ELECTROCHIMICA ACTA | 1993年 / 38卷 / 14期
关键词：
ELECTROCHROMIC ELECTRODE; CONSTANT PHASE ELEMENT; IMPEDANCE SPECTROSCOPY; OXIDE BILAYERED;
D O I：
10.1016/0013-4686(93)80318-T
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Electrochromism in WO3 evaporated thin films can be used in many practical devices. These systems are made of tungsten trioxide vacuum evaporated onto transparent and conductive substrates, ie fluorine doped tin oxide (SnO2:F) or indium-tin oxide (ITO). In this study, impedance spectroscopy is used to characterize the bilayered electrode. A constant phase angle (CPA) behavior in the low frequency range and a pseudo-capacitive-resistive parallel electrical circuit at intermediate frequency are observed. The influence on the impedance data of the amplitude of the ac signal, the cell temperature and the electrode geometry is studied. This approach allows us to present an electrical model for these bilayered non-colored electrodes.
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页码：1935 / 1940
页数：6
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