ELECTROCHROMISM OF ELECTRODEPOSITED TUNGSTEN TRIOXIDE FILMS .1. ELECTROCHEMICAL CHARACTERIZATION

被引：24

作者：

SHEN, PK

CHEN, KY

TSEUNG, ACC

机构：

[1] Chemical Energy Research Centre, Department of Chemistry and Biological Chemistry, University of Essex

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1994年 / 141卷 / 07期

关键词：

D O I：

10.1149/1.2055000

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrodeposited tungsten trioxide films show fast electrochromic response both in aqueous and in nonaqueous solutions. The values of x in the tungsten bronzes, MxWO3, were determined by using a chronopotentiometric technique combined with UV/Vis spectroscopic analysis. The effect of double-layer charging was discussed. A finite diffusion control model was used to analyze the insertion behavior of M+ ions into the films. The apparent diffusion coefficient of Li+ through the electrodeposited WO3 film is about two orders of magnitude higher than that of vacuum-evaporated WO3 films, indicating that electrodeposited films are more suitable for use as display devices than vacuum-evaporated films. The higher porosity of the electrodeposited WO3 films may be a main reason for the fast electrochromic response.

引用

页码：1758 / 1762

页数：5

共 28 条

[1]

ASHRIT PV, 1990, ELECTROCHEMICAL SOC, P45

[2]

Bard A. J., 1980, ELECTROCHEMICAL METH, P143

[3] CORRECTION FOR INCONSTANCY OF CHRONOPOTENTIOMETRIC CONSTANT AT SHORT TRANSITION TIMES [J].