1999 Volume 67 Issue 1 Pages 51-55
The coloring-bleaching process of the electrochromic device (ECD) with solid electrolyte has been studied by using microbalance and quadrupole mass spectrometer. ECD adsorbs H2O gas and releases O2 during coloring. The weight of ECD increases by the adsorbing H2O gas. During bleaching ECD releases H2 and H2O gases and the weight of ECD returns to the weight before coloring. The weight variation of ECD is proportional to the optical density. It is suggested that the adsorbing-releasing gases change the morphology of ECD membranes and cause the crystallization of the membranes and the deterioration of the electrode of ECD.