1-Ethyl-3-propylimidazolium bis(trifluoromethylsulfonyl)imide, CAS: 347882-21-7

Key Applications:

1. Electrochemical Systems

• Electrolyte component for lithium‑ion and sodium‑ion batteries due to high oxidative stability and wide electrochemical window.
• Co‑solvent or additive to improve SEI formation, thermal stability, and high‑temperature cycling.
• Electrolyte for supercapacitors and hybrid capacitors, enabling low volatility and high ionic conductivity.
• Electrodeposition medium for metals (e.g., aluminum, rare‑earth elements) under anhydrous conditions.

2. Solvent and Reaction Medium

• Reaction medium for transition‑metal catalysis requiring thermal and electrochemical stability.
• Solvent for nucleophilic and electrophilic transformations where hydrophobic IL phases enhance selectivity.
• Biphasic catalysis applications where immiscibility with organic solvents simplifies product separation.

3. Separation and Extraction

• Liquid–liquid extraction of lanthanides, actinides, and transition metals using TFSI‑based affinity.
• Gas absorption and CO₂ capture with tunable solubility when paired with co‑solvents.
• Selective extraction of aromatic compounds via hydrophobic and π‑interaction mechanisms.

4. Materials Processing and Polymer Science

• Polymer electrolyte additive to enhance ionic conductivity in PEO, PVDF, and block‑copolymer systems.
• Plasticizer for polymer membranes to improve flexibility and ion transport.
• Dispersion medium for carbon nanotubes, graphene, and metal nanoparticles without surfactants.

5. High‑Temperature and High‑Vacuum Applications

• Thermal‑stable fluid for specialized heat‑transfer and thermal‑storage systems.
• Vacuum‑compatible lubricant for aerospace, semiconductor, and precision tooling environments.

6. Surface Science and Tribology

• Boundary lubricant forming stable ionic layers on metal surfaces to reduce wear and friction.
• Anti‑corrosion additive for steel, aluminum, and copper alloys.

7. Green Chemistry and Safety‑Critical Uses

• Non‑volatile solvent alternative to reduce VOC emissions in synthesis and processing.
• Electrolyte component for flame‑retardant or thermally stable energy‑storage systems.

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