Lithium Bis(fluorosulfonyl)imide (LiFSI)
CAS Number: 171611-11-3
LiFSI is a next-generation electrolyte salt offering superior thermal stability, lower viscosity, and higher ionic conductivity compared to LiPF6, making it ideal for fast-charging and wide-temperature-range battery applications. Its hydrolysis resistance reduces HF generation, extending cell lifetime significantly.
Technical Specifications
| Cl (ppm) | ≤20 |
| Fe (ppm) | ≤1 |
| appearance | White crystalline powder |
| purity (%) | ≥99.9 |
| moisture (ppm) | ≤30 |
| free acid (ppm) | ≤50 |
Applications
- High-power fast-charging lithium-ion electrolytes
- Wide-temperature (-40°C to 60°C) battery applications
- Solid-state and semi-solid electrolyte systems
- Silicon anode electrolyte formulation
- Lithium metal battery electrolyte
Key Features
- Higher thermal stability (decomposition >200°C) versus LiPF6 enhances battery safety
- Lower viscosity electrolyte solutions improve rate performance and low-temperature discharge
- Excellent SEI film-forming properties on silicon and graphite anodes
- Compatible with aluminum current collectors at concentrations ≥1M with film-forming additives
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