Evaluation of Fiber Separators for Use in Thermal Batteries

摘要

Fiberglass tape and borosilicate filter discs impregnated with molten LiCl-/ KC1211u001eeutectic were examined for potential use as separators for high-temperature 211u001eLiSi/LiCl-KCl thermal batteries. Test discs were punched from these materials and 211u001eevaluated at 4000C in single cells at a steady-state current of 63 mA/cmz. The 211u001eperformance generally improved with electrolyte loading for most of the 211u001ematerials. Better results were obtained with the filter discs than with the tape. 211u001eThe best overall results were obtained with Whatman GF/A discs. Active lives for 211u001ecells with these separators were about 85DG/0 of the standard cells with pressed-211u001epowder separators. More work with other materials and electrolytes over a wider 211u001etemperature range is underway, along with 5-cell-battery tests.