Abstract
Solid state batteries were designed around the high conductivity solid electrolyte material RbAg4I5, with the polyiodide salts of tetramethylammnium iodide (Me4NI5 and Me4NI9) as cathodes and silver as the anode. Three-volt batteries, comprising five cells were designed into a hermetic package and fabricated for evaluaton. In March of 1983 these batteries completed 10 years of sto rage at temperatures of -15°C and 23°C. Some disproportionation of the solid electrolyte occurred during the low temperature storage with an increase in the resistance of about two orders of magnitude. This resistive degradation of the batteries was found to be reversible.
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