1-Ethyl-3-methylimidazolium Bis(fluorosulfonyl)imide丨CAS 235789-75-0

1-Ethyl-3-methylimidazolium bis(fluorosulfonyl)imide (EMIM FSI) is an advanced ionic liquid widely applied in electrochemistry, energy storage, catalysis, and materials science. Its unique ionic structure imparts high ionic conductivity, low volatility, and excellent thermal and electrochemical stability, making it an ideal electrolyte for lithium-ion, sodium-ion, and other advanced batteries. EMIM FSI is also utilized in supercapacitors and fuel cells, enhancing energy density, charge-discharge efficiency, and cycle life. In chemical synthesis and catalysis, it serves as a green solvent, promoting reactions under mild conditions while enabling efficient product recovery and recyclability. Furthermore, EMIM FSI is employed in the preparation of ionic liquid-based lubricants, polymer electrolytes, and functional nanomaterials due to its ability to stabilize charged species and facilitate ionic interactions. Its excellent solubility for salts, polymers, and organic compounds broadens its application in material processing, electroplating, and nanostructured composite fabrication.

The benefits of EMIM FSI stem from its outstanding electrochemical, thermal, and chemical properties. Its high ionic conductivity and low viscosity improve the performance of batteries and supercapacitors, enabling faster charge-discharge rates and higher energy efficiencies. The compound exhibits a wide electrochemical stability window, which reduces degradation and enhances device longevity. Unlike conventional organic solvents, EMIM FSI is non-volatile and non-flammable, significantly improving safety and operational reliability in high-temperature or high-energy applications. Its chemical inertness allows compatibility with diverse electrode materials, electrolytes, and catalysts, making it highly versatile in various electrochemical and synthetic processes. Additionally, EMIM FSI is recyclable and environmentally friendlier than traditional solvents, supporting sustainable and green chemistry practices. Its ability to stabilize ions and facilitate ion transport enhances reaction rates and selectivity, offering efficiency advantages in both industrial and research applications.