The holding characteristics of the glass filter separators of molten salt electrolyte for thermal batteries

The electrolyte separator for thermal battery should be easily handled and loaded a large amount of the molten salt. Ceramic fibers, especially fibrous commercial glass filters were used as an electrolyte separator and the lithium based molten salts were infiltrated into the ceramic filters. The pore structures of the ceramic filter and the melting properties of the lithium salts affected to the electrolyte loading and leakage. During the infiltration, ions of Li⁺ and F^- in the molten salts were reacted with the glass fiber and caused to be weaken the fiber strength.