Two New Silver Electrolytes of Possible Use in Solid-State Batteries

Two new silver solid electrolytes, having high ionic conductivity, have been found in the systems AgI-Ag~AsO4 and AgI-Ag3VO4. The most remark-able advantage of these electrolytes is their excellent stability in iodine and moisture. The possibility of using these solid ionic conductors in silver-iodine solid-state batteries has also been investigated. Recently Takahashi and co-workers (1) reported the discovery of silver solid conductors based on the combination of silver iodide with silver oxyacid salts. In particular they studied the systems AgI-Ag3PO4, AgI-Ag4P2OT, and AgI-Ag2WO4 finding intermediate compounds which have the characteristics of high ionic conductivity silver solid electrolytes with average structures. The properties of these electrolytes are summarized in Table I