Ceramics-Silikáty 43, (4) 181 - 186 (1999)

Glasses with unusually high ionic conductivity at a room temperature have been studied for many years by reason of their application in various electrochemical solid state devices such as rechargeable batteries and chemical sensors. New fast ion-conducting glasses were prepared in the basic system CuI-Cu₂O-MoO₃ by replacing MoO₃ with V₂O₅ and/or WO₃. The glasses exhibited a high ionic conductivity at 25 °C in the range 0.22 to 0.87 S m⁻¹ and much lower electronic conductivity, which was at least four orders of magnitude lower than the ionic conductivity. CuI positively affected the ionic conductivity, but decreased both glassforming ability and glass stability. The glassforming ability and stability of the glasses were improved by addition of V₂O₅.