Ethyldimethylpropylammonium bis(trifluormethylsulfonyl)imide,  CAS: 258273-77-7

Key Applications:

Electrochemical and Energy Applications

• Electrolyte component for high‑voltage systems, including supercapacitors and advanced lithium‑free devices, where TFSI⁻ enhances oxidative stability.
• Co‑solvent or ionic additive to reduce viscosity and improve ion mobility in mixed‑ionic‑liquid electrolyte formulations.
• Electrode surface modifier, supporting stable interfacial layers in carbon‑based and metal‑oxide electrodes.

Materials Science and Polymer Processing

• Plasticizer for high‑performance polymers, particularly fluorinated and engineering plastics requiring thermal stability and low volatility.
• Ionic dopant in polymer electrolytes, improving conductivity and mechanical flexibility in solid or gel polymer matrices.
• Processing aid for advanced composites, enhancing dispersion of fillers such as carbon nanotubes, graphene, and metal oxides.

Catalysis and Synthesis

• Non‑volatile reaction medium for organic transformations requiring high temperature and low nucleophilicity.
• Phase‑transfer medium for biphasic catalytic systems, leveraging the hydrophobic TFSI⁻ anion to separate product streams efficiently.
• Stabilizing environment for metal catalysts, particularly in reductive or oxidative transformations where moisture‑free conditions are essential.

Separation and Extraction

• Hydrophobic extraction phase for selective removal of metal ions, hydrophobic organics, or fluorinated species.
• Solvent for liquid–liquid extraction in systems requiring low miscibility with water and high chemical inertness.
• Medium for gas absorption studies, including CO₂ and SO₂ uptake, where TFSI‑based ionic liquids provide predictable solvation behavior.

Thermal and Process Engineering

• Heat‑transfer fluid component in closed, high‑temperature systems due to its thermal robustness and low vapor pressure.
• Lubrication additive for specialty formulations where ionic liquids improve boundary lubrication and reduce wear.
• Stability enhancer in formulations exposed to oxidative or thermal stress.

Analytical and Research Uses

• Reference ionic liquid for studying structure–property relationships in quaternary ammonium TFSI salts.
• Medium for spectroscopic and electrochemical characterization, offering a wide electrochemical window and low background reactivity.
• Benchmarking fluid in viscosity, conductivity, and solvation studies.

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