Diethylmethylsulfonium bis(trifluoromethylsulfonyl)imide, CAS: 792188-85-3

Key Applications:

1. Electrolytes for High‑Performance Energy Storage

• Serves as a thermally stable ionic liquid electrolyte component for Li‑ion, Na‑ion, and multivalent battery systems.
• The sulfonium cation provides high oxidative stability, enabling use with high‑voltage cathode materials.
• TFSI⁻ anion ensures low viscosity, high ionic conductivity, and wide electrochemical windows.
• Useful in solid–liquid hybrid electrolytes, polymer electrolytes, and gel matrices.

2. Supercapacitors and Hybrid Capacitors

• Functions as a conductive ionic medium in EDLCs and pseudocapacitors, offering excellent thermal and electrochemical stability.
• Enhances power density and cycling durability when paired with carbonaceous electrodes.

3. Solvent and Reaction Medium for Organic & Organometallic Chemistry

• Acts as a non‑volatile, non‑flammable reaction solvent for transformations requiring strong ion‑pairing or high-temperature stability.
• Suitable for catalysis, electro-organic synthesis, and transition‑metal mediated reactions.
• The sulfonium cation can participate in phase-transfer–like behavior, improving solubility of polar intermediates.

4. Antistatic and Surface‑Modification Additive

• Useful in polymer formulations as an antistatic agent due to its permanent ionic character.
• Can be incorporated into coatings, films, and specialty plastics to reduce surface resistivity and improve charge dissipation.

5. Thermal‑Stability Enhancer in Specialty Fluids

• The TFSI⁻ anion imparts exceptional thermal and chemical robustness, making DEMS‑TFSI suitable for:
  • Heat‑transfer fluids
  • High‑temperature lubricants
  • Specialty hydraulic or dielectric fluids
• Offers low volatility and broad liquid‑phase stability.

6. Precursor for Tailored Ionic Liquid Blends

• Can be blended with other ionic liquids to tune:
  • Viscosity
  • Conductivity
  • Solvation power
  • Hydrophobicity
• Useful for custom electrolyte formulations, separation media, and task‑specific ionic liquids.

7. Electrochemical Devices & Sensors

• Provides a stable ionic environment for electrochemical sensors, reference electrodes, and ionic gating materials.
• High purity (>99%) supports reproducible signal stability and low background current.

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