Ion transfer at interfaces between silver ion conductive solids

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Ion transfer in addition to electron transfer at interfaces between electrode and electrolyte plays an important role for sensors, batteries, and so on. Electron transfer at interfaces between two different solid has been well-investigated, for typical examples of pn junctions of semi-conductors. Ion transfer has been also well-studied for liquid-liquid interfaces. However, in the case of interfaces between two different solids, there have been few studies on ion transfer at the interfaces. In this work, impedance for the ionic transfer at interfaces has been focused, and ionic transfer between silver ion conductive solids was investigated. Following are the summary of this work.1) Silver ion transfer between α-AgI and AgCFィイD23ィエD2SOィイD23ィエD2 dispersed polyethylene oxide(AgCFィイD23ィエD2SOィイD23ィエD2-PEO)was studied by chronoamperometry. Resistance for the silver ion transfer from α-AgI to AgCFィイD23ィエD2SOィイD23ィエD2 was found to be larger than that for the transfer from AgCFィイD23ィエD2SOィイD23ィエD2-PEO to α-AgI.2) Relaxation of open circuit voltage was measured for the cells of Ag/α-AgI/AgCFィイD23ィエD2SOィイD23ィエD2/Ag. Relaxation time was faster when silver ion transfers at interfaces from AgCFィイD23ィエD2SOィイD23ィエD2-PEO to α-AgI, which is in good agreement with the results of chronoamperometry.