Abstract
Tungstic oxide/polyaniline composite films were prepared by a double‐pulse electrodeposition technique, and their properties were investigated by in situ optical and electrochemical techniques. Such composite films are more conducting than pure 
films. The films have an electrochromic window between the anodic coloration of polyaniline and the cathodic coloration of tungsten trioxide. The films should find useful applications as multicolor display devices.