Lithium bis(trifluoromethylsulfonyl)imide, CAS: 90076-65-6

Key Applications:

1. Lithium‑Ion Battery Electrolytes

• High‑conductivity lithium salt for liquid electrolytes in Li‑ion cells.
• Enables stable SEI formation on graphite and silicon‑based anodes.
• Compatible with high‑voltage cathode chemistries (NMC, NCA, LCO).
• Reduces electrolyte flammability relative to LiPF₆‑based systems.
• Suitable for carbonate, ether, and sulfone solvent systems.

2. Solid‑State and Polymer Electrolytes

• Key dopant for PEO‑based polymer electrolytes, improving segmental mobility and Li⁺ transport.
• Used in single‑ion conducting polymer matrices and hybrid polymer–ceramic systems.
• Supports high‑temperature operation and wide electrochemical stability windows.
• Common in solid‑state battery R&D for both thin‑film and bulk architectures.

3. Lithium Metal and Lithium‑Sulfur Batteries

• Enhances interfacial stability at lithium metal surfaces.
• Reduces dendrite formation when paired with optimized solvent or polymer systems.
• Compatible with ether‑based electrolytes used in Li–S and Li–metal cells.
• Improves cycling efficiency and Coulombic retention in high‑energy chemistries.

4. Supercapacitors and Hybrid Capacitors

• Employed as a high‑conductivity salt in organic electrolytes for EDLCs.
• Supports wide operating voltage windows and low ESR.
• Used in hybrid Li‑ion capacitors requiring fast ion transport.

5. Ionic Liquid and Deep Eutectic Electrolytes

• Serves as a lithium source in TFSI‑based ionic liquids, enabling non‑volatile, non‑flammable electrolyte systems.
• Facilitates high‑temperature electrochemical devices and specialty capacitors.
• Compatible with imidazolium, pyrrolidinium, and ammonium ionic liquid matrices.

6. Electrochemical Research and High‑Voltage Systems

• Benchmark salt for evaluating new solvent systems, co‑salts, and electrolyte additives.
• Used in high‑voltage (≥4.5 V) cathode development due to oxidative stability of the TFSI⁻ anion.
• Supports testing of fluorinated co‑solvents, localized high‑concentration electrolytes (LHCEs), and advanced SEI/CEI engineering.

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