Fluoroethylene Carbonate (FEC)
Battery-grade Fluoroethylene Carbonate (FEC, CAS 114435-02-8), min. 99.9%, low water, supplied wholesale by Zyntex. Electrolyte additive for lithium-ion cells with graphite and silicon anodes. CoA and SDS with every lot.
Description
Fluoroethylene Carbonate Product Overview
Fluoroethylene carbonate (C3H3FO3) is a clear, colorless liquid or low-melting solid (about 18–23°C). It is the fluorinated derivative of Ethylene Carbonate and is reduced earlier than other electrolyte components during the first charge.
In addition, electrolyte producers add it at about 1–10%, together with Vinylene Carbonate, to form a thin, flexible, LiF-rich protective layer (SEI) on graphite and especially on silicon anodes, which expand strongly during cycling. This improves cycle life and efficiency in high-energy cells for electric vehicles and electronics. It is used with salts such as Lithium Hexafluorophosphate.
Notably, battery grades are specified by purity, water content, acidity and color. Related electrolyte materials in our range include Dimethyl Carbonate and Ethyl Methyl Carbonate.
Key Applications of Fluoroethylene Carbonate
Typical uses include, for example:
🔋 Silicon Anodes
SEI former for high-energy cells.
🚗 EV Batteries
Longer cycle life.
📱 Consumer Cells
Electrolyte additive.
🔬 Battery Research
Electrolyte development.
Fluoroethylene Carbonate Technical Specifications
| Parameter | Standard Value |
|---|---|
| Product Name | Fluoroethylene Carbonate (FEC) |
| CAS Number | 114435-02-8 |
| Molecular Formula / Weight | C3H3FO3 / 106.05 g/mol |
| Purity (GC) | Min. 99.9% (battery grade) |
| Water | Max. 30 ppm |
| Documents | CoA and SDS with every lot |
⚠️ Safety & Handling: Harmful if swallowed and causes serious eye irritation; may release hydrogen fluoride on decomposition. Handle under dry inert gas, and also wear gloves and eye protection. Store in tightly closed containers in a cool, dry place. Always consult the Safety Data Sheet (SDS), because it contains the full classification and handling instructions.
Frequently Asked Questions
Why is FEC important for silicon anodes?
It forms a flexible, LiF-rich protective layer that copes with the strong expansion of silicon.
How much FEC is added?
Typically about 1–10%, depending on the anode and cell design.
How can I get a price and documents?
We supply flexible quantities, from small orders to large volumes, so you do not need to meet the high minimum orders of large producers. Please contact us with your required volume, and we will send a quotation together with the CoA and SDS.
