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.

Fluoroethylene Carbonate (FEC) Manufacturer

Chemical Specifications of Fluoroethylene Carbonate

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

Key Benefits and Features

  • Enhances formation of a stable SEI (Solid Electrolyte Interphase) layer
  • Improves battery cycle life and thermal stability
  • Reduces gas formation and prevents capacity fading
  • Effective under high-voltage and fast-charging conditions
  • Maintains high purity and low moisture for consistent performance
  • Compatible with a wide range of electrolyte blends and additives

Industries We Serve

Fluoroethylene Carbonate manufacturer

Electric Vehicles (EVs)

Fluoroethylene Carbonate in consumer electronics

Consumer Electronics

Fluoroethylene Carbonate in energy storage system

Energy Storage Systems (ESS)

Fluoroethylene Carbonate for power tools

Power Tools

Frequently Asked Questions (FAQ)

What is the primary function of Fluoroethylene Carbonate (FEC) in battery electrolytes?

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.

How does FEC improve battery safety?

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.

What is the CAS number and molecular formula of FEC?

The CAS number of Fluoroethylene Carbonate is 114435-02-8, its molecular formula is C₃H₃FO₃, and its molecular weight is 106.05 g/mol.

What is the physical appearance of Fluoroethylene Carbonate?

It is a colorless, transparent liquid at temperatures above its melting point of approximately 25°C.

What is the recommended dosage of FEC in battery electrolytes?

FEC is typically added in concentrations ranging from 2% to 10% by weight, depending on the specific anode chemistry and cell requirements.

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