Silver sulfide based glasses: (II). Electrochemical properties of GeS 2Ag 2SAgl glasses: transference number measurement and redox stability range

Abstract

The transference numbers of the species responsible for current transport, in GeS 2Ag 2SAgI glasses, have been determined. Tubandt's method shows that the transference number of the Ag cation is equal to 1 (to within 2%). By electrochemical semipermeability flux measurement, the electronic transference number was estimate to be less than 10 −8, and by tringular voltammetry, the transference number of the iodide anion at approximately 10 −5. Triangular voltammetry can also be used to measure the redox stability range, which is about 3 V for current densities of 0.1 mA/cm 2. This high value is due to the low mobility of the anions below the glass transition temperature.