Bistrifluoromethanesulfonimide Lithium Salt CAS 90076-65-6

In liquid lithium-ion batteries, LiTFSI is frequently used as a solute or additive in the electrolyte. Due to its high ionic conductivity and wide electrochemical window, it can significantly improve the rate performance and cycle life of the battery. Especially in scenarios requiring wide temperature range operation (such as military or extreme environments), LiTFSI exhibits superior performance compared to LiPF₆. Furthermore, LiTFSI helps form a robust solid electrolyte interface (SEI) film rich in inorganic lithium salts on the negative electrode surface, thereby protecting the negative electrode and promoting rapid lithium-ion transport.

LiTFSI has unique advantages in the field of solid-state batteries. It has good compatibility with polymer matrices such as polyethylene oxide (PEO) and is often used as a lithium salt in solid polymer electrolytes. LiTFSI not only provides lithium-ion transport channels, but its anions also act as plasticizers, reducing the crystallinity of the polymer and thus improving ionic conductivity. In all-solid-state sulfide electrolyte systems, LiTFSI can also be used for interface modification to address interface instability issues.

Beyond battery applications, LiTFSI is also used to prepare room-temperature ionic liquids as high-performance solvents or electrolytes. In organic synthesis, it can serve as a Lewis acid catalyst, promoting reactions such as hydrolysis and redox reactions. Furthermore, in perovskite solar cells, LiTFSI is frequently used as a dopant in hole transport materials to improve the device’s photoelectric conversion efficiency.

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