Calcium(II) Bis(trifluoromethanesulfonyl)imide is primarily used as a key component in the formulation of electrolytes for advanced lithium-ion and calcium-ion batteries. Its high ionic conductivity and stability at elevated temperatures make it ideal for improving battery performance, particularly in high-energy-density applications. Additionally, it is employed in electrochemical devices such as supercapacitors, where it enhances charge storage and transfer efficiency. The compound is also utilized in the development of solid-state electrolytes, contributing to safer and more durable energy storage systems. Its compatibility with various solvents and electrodes further expands its use in cutting-edge energy research and industrial applications.