Direct evidence for purely silver ion conduction in CuI-doped silver oxysalt superionic systems: Combined electrolysis and EDS studies
By Murugesan, S. & Bergman, B.
Published in Electrochimica Acta
NULL
2007
Abstract
Maiden attempt has been made for the direct estimation of the contributions of silver and copper ions to the ionic conductivity in superionic solids obtained in CuI-doped silver oxysalt systems. The application of the combined electrolysis and EDS techniques towards qualitative and quantitative analyses of the mobile ionic species in solid electrolyte systems having more than one possible mobile ion is reported. These studies confirmed that these electrolyte materials are purely Ag+ conducting up to 50 mol% CuI in xCuI–(100 - x)[2Ag2O–0.7V2O5–0.3B2O3] and xCuI–(100 - x)[Ag2O–0.7MoO3–0.3WO3] systems and small fraction of tCu+ exists above 60 mol% CuI. These solid electrolyte materials exhibited a high ionic transport numbers (ti) of >0.985 and the ti increases when two glass formers are used.
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