Fluoroethylene Carbonate (FEC)

Fluoroethylene Carbonate (FEC) – High-Performance SEI Additive for Li-ion Batteries

Fluoroethylene Carbonate (FEC) is a fluorinated cyclic carbonate widely used as an electrolyte additive in lithium-ion batteries. It promotes the formation of a stable and robust SEI (Solid Electrolyte Interphase) layer, especially on silicon-based anodes, significantly enhancing cycle life, thermal stability, and high-voltage performance.

🔬 Product Details

• CAS No.: 114435-02-8

• Purity: ≥99.9% (battery grade)

• Appearance: Clear, colorless to pale yellow liquid

• Boiling Point: ~220 °C (decomposes)

• Melting Point: ~22–24 °C

• Density: ~1.45 g/cm³ at 20 °C

⚙️ Applications

• SEI-forming additive for Li-ion battery electrolytes (1–5 wt%)

• Improves stability for high-capacity anode materials (e.g., Si, SiOx)

• Enhances performance in fast-charging and low-temperature conditions

• Used in high-energy density pouch cells, cylindrical cells, and prismatic cells

⚠️ Safety Information

• Harmful if inhaled or ingested

• May cause irritation to eyes, skin, and respiratory system

• Handle with care in a well-ventilated environment using PPE

• SDS available upon request

📦 Packaging Options

• 1 kg | 5 kg bottles

• 20 kg jerry cans

• 200 kg drum (on request)