1-Ethylpyridinium bis(trifluoromethylsulfonyl)imide, CAS: 244193-65-5

Key Applications:

Electrolytes for Energy Storage 

• High‑conductivity ionic liquid electrolyte for lithium‑ion, sodium‑ion, and magnesium‑ion batteries, especially in high‑temperature or high‑voltage environments. 

• Component in supercapacitor electrolytes, improving thermal stability and widening the electrochemical window. 

• Used in redox‑flow battery research where low volatility and strong anion stability are required.

Catalysis & Organic Synthesis 

• Polar, thermally stable reaction medium for Friedel–Crafts, nucleophilic substitutions, and transition‑metal‑catalyzed transformations. 

• Enhances selectivity in biphasic catalytic systems, enabling efficient product separation. 

• Employed as a non‑coordinating ionic environment for organometallic catalysis and mechanistic studies.

High‑Temperature & High‑Stability Solvent 

• Ideal for thermally demanding reactions due to its low vapor pressure and exceptional oxidative stability. 

• Used in spectroscopic studies (NMR, IR, electrochemical) requiring inert, non‑volatile ionic media.

Electrochemical & Surface Science 

• Electrolyte for electrodeposition of metals and alloys, particularly where moisture‑free conditions are essential. 

• Medium for electrochemical impedance spectroscopy (EIS) and cyclic voltammetry in fundamental ion‑transport studies. 

• Supports formation of stable electric double layers in advanced electrochemical interfaces.

Separation, Extraction & Purification 

• Tunable solvent for liquid–liquid extraction of metal ions, dyes, and organic contaminants. 

• Applied in CO₂ capture, SO₂ absorption, and gas‑separation research due to the TFSI⁻ anion’s hydrophobicity. 

• Used in ionic‑liquid‑based chromatography as a stationary‑phase modifier.

Polymer & Materials Engineering 

• Additive or processing aid in ion‑conducting polymers, polymer electrolytes, and block‑copolymer self‑assembly. 

• Plasticizer for high‑performance elastomers and specialty materials requiring thermal stability. 

• Employed in nanomaterials synthesis, including templated nanoparticle growth and surface functionalization.

Fundamental Research 

• Model ionic liquid for studying cation–anion interactions, solvation dynamics, and ion transport. 

• Benchmark system in molecular dynamics simulations and physicochemical property mapping (viscosity, conductivity, density).

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