CAS · 90076-65-6
Product Overview
Lithium bis(trifluoromethanesulphonyl)imide is a high-purity solar-energy-materials supplied for industrial and specialty chemical applications. Contact our team for specifications, packaging options and lead times.
Product Specifications
| Appearance: | White powder |
|---|---|
| Assay(CF3SO2)2NLi: | 99.9% min |
| PH: | 6.0–9.0 |
| H2O: | 100ppm max |
| F: | 20ppm max |
| Cl: | 15ppm max |
| SO4: | 20ppm max |
| Al: | 1ppm max |
| Ca: | 5ppm max |
| Cu: | 1ppm max |
| Fe: | 2ppm max |
| K: | 5ppm max |
| Mg: | 1ppm max |
| Na: | 10ppm max |
| Ni: | 1ppm max |
| Pb: | 1ppm max |
| Si: | 5ppm max |
| Zn: | 1ppm max |
Applications
1. Lithium-ion Batteries (LIBs)
LiTFSI is used as a lithium salt in the electrolyte solution of lithium-ion batteries, often as a replacement or complement to LiPF₆. It enhances:
Ionic conductivity
Thermal stability of the electrolyte
Cycle life of the battery
Safety, by reducing gas formation and decomposition risks
It is compatible with:
Liquid electrolytes (carbonate-based solvents)
Solid polymer electrolytes (e.g., PEO-based)
Gel polymer electrolytes
Applications:
Consumer electronics
Electric vehicles (EVs)
Energy storage systems (ESS)
2. Solid-State and Polymer Electrolytes
LiTFSI is a preferred lithium source for solid polymer electrolytes due to:
High dissociation ability (free lithium ions)
Low interaction with polymer matrices
It is widely used with polyethylene oxide (PEO) or other polymer matrices to prepare solid-state batteries (SSBs) or all-solid-state lithium batteries (ASSLBs), which are seen as the future of safe, high-energy-density storage.
3. Supercapacitors
LiTFSI is employed in the electrolyte of electrochemical capacitors (supercapacitors) for:
Higher ionic mobility
Extended voltage range
Enhanced power density
It can be used in both aqueous and non-aqueous systems.
4. Ionic Liquids and Electrolyte Additive
LiTFSI is soluble in and compatible with a wide range of ionic liquids, which are used in:
Advanced energy storage devices
Electrochemical actuators
Electroplating and electropolishing
In this context, LiTFSI contributes to low flammability, non-volatility, and long-term electrolyte stability.
5. Electrochemical Devices
It is also useful in:
Lithium metal batteries
Lithium-sulfur (Li–S) batteries
Lithium-air (Li–O₂) batteries
Redox flow batteries
LiTFSI helps improve ionic conductivity in low dielectric constant media and stabilizes interfaces (e.g., Li-metal anode/electrolyte).
6. Catalysis and Synthesis
In some chemical syntheses, LiTFSI is used:
As a supporting electrolyte in electrosynthesis
In ionic liquid formation
As a phase-transfer agent or acid catalyst substitute
Benefits
✅ High Electrochemical Stability
LiTFSI has a wide electrochemical window (up to 5.5V), making it suitable for high-voltage cathodes and next-generation batteries.
✅ Excellent Thermal Stability
Thermally stable up to 300°C, far superior to LiPF₆, making it ideal for high-temperature operations and safer battery systems.
✅ Low Hygroscopicity and Non-Corrosiveness
Unlike LiPF₆, LiTFSI does not release HF (hydrofluoric acid) upon hydrolysis, reducing risks of corrosion and improving the lifetime of electrodes.
✅ High Ionic Conductivity
Enhances ion transport in both liquid and solid-state systems, which improves power output and charge/discharge efficiency.
✅ Chemical Compatibility
Compatible with a broad range of solvents, polymers, and electrode materials, allowing versatile formulation of electrolytes.
✅ Reduced Side Reactions
Its stable anion (TFSI⁻) minimizes side reactions, SEI layer degradation, and thermal decomposition in comparison with other lithium salts.
Conclusion
Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) is a premium lithium salt that plays a critical role in the evolution of energy storage technologies. With its outstanding thermal, chemical, and electrochemical properties, it enables the development of next-generation batteries, including solid-state, high-voltage, and long-life systems. Additionally, its stability and compatibility make it a versatile component in electrochemical research, ionic liquids, and advanced capacitor systems.
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