Electrolyte Additive – Fluoroethylene Carbonate (FEC) C3H3FO3

• Product name: Fluoroethylene Carbonate (FEC)
• Synonym(s): 4-Fluoro-1,3-dioxolan-2-one, Fluorinated ethylene carbonate
• Chemical formula: C₃H₃FO₃
• CAS#: 114435-02-8
• Molecular weight: 106.05 g/mol
• Purity: Battery grade
• Appearance: Colorless transparent liquid
• Weight: 250ml/370g

Fluoroethylene carbonate (FEC) is a critical electrolyte additive that can form high-quality SEI film which suppresses side reactions between electrolyte and battery electrodes, and thus enhance cycling performance and even low-temperature of lithium-ion batteries.