Ammonium hexafluorophosphate is widely used as an electrolyte additive in lithium-ion batteries, where it enhances conductivity and improves battery performance. It is also employed in electrochemical applications, such as in the preparation of ionic liquids, due to its stability and non-reactive nature. In organic synthesis, it serves as a counterion in the isolation of cationic species, facilitating various chemical reactions. Additionally, it finds use in the production of specialty chemicals and materials, particularly in processes requiring non-coordinating anions. Its role in surface treatment and coating industries is notable, where it contributes to the modification of material properties for improved durability and functionality.