Electrochemical studies on solid state cells with mol % 70AgI-20Ag2O-10(0.8V2O5-0.2P2O5) amorphous electrolyte and organic cathodes

Abstract

The highest conducting amorphous solid electrolyte composition (mol %) 70AgI-20Ag2O-10(0.8V2O5-0.2P2O5) in the system AgI-Ag2O-V2O5-P2O5 was investigated as an electrolyte material for solid state cells with organic cathodes by studying the electrochemical properties. The variation of open circuit voltage (OCV) with temperature, current discharge and the load characteristics were determined for the cells with iodine, tetramethyl ammonium iodide and tetrabutyl ammonium iodide as cathode materials. The cell capacities were estimated from the load characteristic curves and, in general, the cells were found to have very good stability at low current discharges even at high temperatures. In addition, it was found that the silver on the working electrode is electrochemically active and can be oxidized to Ag+ ions, making the organic cathode cells rechargeable. Thus these cells find potential use in rechargeable micropower sources and uninterrupted power supplies for microelectronic circuit devices.