Introduction to 4-Fluoro-1.3-dioxolan-2-one (FEC)

4-Fluoro-1.3-dioxolan-2-one, also known as fluoroethylene carbonate (FEC), is a high-purity chemical compound widely used in the synthesis of advanced materials and as an electrolyte additive in lithium-ion batteries. This article provides a comprehensive overview of its chemical properties, applications, and safety considerations.

Chemical Properties

4-Fluoro-1.3-dioxolan-2-one (FEC) is a colorless liquid with a characteristic odor. It is highly reactive and has a relative dielectric constant of 102. making it an excellent solvent and additive in various applications.

Applications

1. Lithium-ion Batteries

FEC is primarily used as an electrolyte additive in lithium-ion batteries. It forms a thin, smooth, and stable solid electrolyte interphase (SEI) layer, which enhances the cycling efficiency and discharge capacity retention of secondary batteries.

2. Organic Synthesis

FEC is also used as an intermediate in organic synthesis, particularly in the production of high-performance polymers and other advanced materials.

Safety and Handling

FEC is classified as a hazardous substance with the following hazard statements:

H302: Harmful if swallowed.

H315: Causes skin irritation.

H317: May cause an allergic skin reaction.

H319: Causes serious eye irritation.

Precautionary Statements:

P261: Avoid breathing dust/fume/gas/mist/vapors/spray.

P280: Wear protective gloves/protective clothing/eye protection/face protection.

P305 + P351 + P338: If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing.

P333 + P313: If skin irritation or rash occurs: Get medical advice/attention.

Conclusion

4-Fluoro-1.3-dioxolan-2-one (FEC) is a versatile and high-performance chemical compound with a wide range of applications in lithium-ion batteries and organic synthesis. Its unique properties make it an essential component in the development of advanced materials and energy storage devices. Proper handling and safety measures are crucial to ensure its safe and effective use.