Fluoroethylene Carbonate (FEC) is one of the finest electrolyte additives to improve lithium-ion battery strength and performance. Renowned for its ability to build a stable Solid Electrolyte Interphase (SEI) on an anode, FEC assists in the advancement of the battery’s cycling stability, capacity retention as well as overall safety. Optimization of this additive is particularly helpful in systems of high voltage and capacity, where integrity and function over extended charge cycles are required.
With the increase in the demand for long-lasting and high-performance batteries in sectors including electric vehicles (EVs), energy storage systems (ESS), and consumer electronics, FEC assumes a life-saving role in increasing battery efficiency. Its exceptional electrochemical attributes enable it to positively change the stability of the SEI layer considerably, limiting the undesired reactions and avoiding capacity fade. By integrating FEC, producers can manufacture batteries that not only achieve a longer life cycle but also can work safely and effectively in extremes.
| Property | Details |
|---|---|
| Chemical Formula | C3H4F2O3 |
| Molecular Weight | 138.06 g/mol |
| Appearance | Clear, colorless liquid |
| Purity | ≥ 99% |
| Boiling Point | 134–136°C |
| Melting Point | -80°C |
| Density | 1.33 g/cm³ |
| Viscosity | 0.50 mPa·s (at 25°C) |
| Flash Point | 61°C (Closed cup) |
| Solubility | Soluble in organic solvents, slightly soluble in water |
| Reactivity | Stable under normal conditions, reacts with strong bases and reducing agents |
Electric Vehicles (EVs)
Consumer Electronics
Energy Storage Systems (ESS)
Power Tools
FEC is a premium-grade electrolyte additive used to form a stable, flexible, and robust Solid Electrolyte Interphase (SEI) layer on silicon and lithium metal anodes, reducing capacity fade.
By creating a more thermally and electrochemically stable SEI layer, FEC minimizes unwanted exothermic side reactions and gas generation inside the cell, reducing the risk of thermal runaway.
The CAS number of Fluoroethylene Carbonate is 114435-02-8, its molecular formula is C₃H₃FO₃, and its molecular weight is 106.05 g/mol.
It is a colorless, transparent liquid at temperatures above its melting point of approximately 25°C.
FEC is typically added in concentrations ranging from 2% to 10% by weight, depending on the specific anode chemistry and cell requirements.