Lithium Bis(trifluoromethanesulphonyl)imide丨CAS 90076-65-6

 

 

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:

Liquid electrolytes (carbonate-based solvents)

Solid polymer electrolytes (e.g., PEO-based)

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2. Solid-State and Polymer Electrolytes

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.

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3. Supercapacitors

It can be used in both aqueous and non-aqueous systems.

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4. Ionic Liquids and Electrolyte Additive

In this context, LiTFSI contributes to low flammability, non-volatility, and long-term electrolyte stability.

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5. Electrochemical Devices

Lithium-sulfur (Li–S) batteries

Lithium-air (Li–O₂) batteries

LiTFSI helps improve ionic conductivity in low dielectric constant media and stabilizes interfaces (e.g., Li-metal anode/electrolyte).

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6. Catalysis and Synthesis

As a phase-transfer agent or acid catalyst substitute

 

 

 

LiTFSI has a wide electrochemical window (up to 5.5V), making it suitable for high-voltage cathodes and next-generation batteries.

Thermally stable up to 300℃, 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.

Enhances ion transport in both liquid and solid-state systems, which improves power output and charge/discharge efficiency.

Compatible with a broad range of solvents, polymers, and electrode materials, allowing versatile formulation of electrolytes.

Its stable anion (TFSI⁻) minimizes side reactions, SEI layer degradation, and thermal decomposition in comparison with other lithium salts.

 

 

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.