ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 24, Number 4
JKCSEZ 24(4)
August 20, 1980 

The electrical conductivity of solid electrolyte RbAg4I5 single crystal was studied at various temperatures. The four-probe method was used in measuring the conductance with an ac signal imposed on the specimen. The ionic conductivity was 0.284 ohm-1 cm-1 at 25℃, and the activation energy for Ag+ ion migration was calulated to be 1.70 kcal/mole. These values agree well with those reported for polycrystalline samples. Reactions at Ag/RbAg4I5 interface were studied by cyclic voltammetry with a silver reference electrode. It was found that silver ion is reversibly reduced at silver surfaces below zero volt, and iodide was oxidized above +0.67 volt.The anodic current arising from the oxidation of the electrode was small in magnitude initially over a wide range of potential, but, after silver was cathodically deposited on the electrode, reversing the potential sweep to the anodic direction resulted in a sharp peak of anodic current.