Compatability and accelerated aging study for Li(Si)FeS2 thermally activated batteries

Thermally activated batteries using the Li(Si)/FeS2 system are being developed by Sandia National Laboratories. These components ae used in systems which require a storage life of 25 years and high reliability. A previous aging study was completed on this system, but no organic materials other than those in the electrical match and heat paper fuse strips were included. The present study incorporates all of the materials in the system, both organic and inorganic, except for the electric match and heat paper. There are two main parts in this study: (1) a compatibility study in which the four organic materials under investigation are placed in a hermetically sealed stainless steel container with battery components; (2) an aging study of pairs of material and individual materials in which one organic material is placed in a hermetically sealed stainless steel container with battery components. The compatibility study examines effects of some materials upon others (outgassing, etc.) which would cause degradation and/or functional failure.