Effect of fiberglass on the molten salt electrolyte characteristics in thermal battery

摘要

Fiberglass in electrolyte of thermal battery was used to improve safety performance at high temperature operating for thermal battery. Electrolyte-binder (EB) normally consist of mixtures of 65% LiCl-KCl molten salt and 35% MgO binder. In this paper, three fiberglass compositions were studied. These compositions were non-fiberglass, 5 wt% fiberglass and 10 wt% fiberglass in electrolyte binder mixture. The characteristics of the EB/fiberglass powder were analyzed for moisture content, impurity, activated energy and BET surface area. The characteristics of the EB/fiberglass pellet were evaluated for electrolyte leakage at high operating temperature of 400 °C, 500 °C and 600 °C. The result shows that 5%fiber is an appropriate fiberglass composition in molten salt electrolyte. The reduced electrolyte leakage is 2.8387 (73.50%), 2.1690 (52.60%) and 4.2574 (52.25%) mg/cm²for 400 °C, 500 °C and 600 °C respectively.