Used as an electrolyte component in lithium-ion batteries due to its good thermal stability and ionic conductivity. It helps improve battery performance at low temperatures and enhances safety by reducing flammability. Also employed in aqueous two-phase systems for protein separation in biochemical applications. Its hygroscopic nature makes it useful in certain types of dehumidification and gas drying processes. Additionally, it serves as a lithium source in the synthesis of other lithium-containing compounds and materials.