Materials / grade-specific review
VC / FEC Electrolyte Additive Set
Vinylene carbonate and fluoroethylene carbonate at ≥99.5% and ≥99.9% — the two additives that decide whether an SEI survives.
APPLICATION & GRADE
Grade / designation: SZ-M1-ST03
Grade and specification to be confirmed
Discuss Material Requirements ↗Typical applications
Electrolyte formulation and screening
Silicon and SiOx anode electrolytes
Sodium-ion electrolyte development
Cycle-life improvement studies
Grade & supply review
Purity and individual impurity limits
Salt form and particle size
Additive ratio and blended packages
Dangerous-goods packing and transport documentation
Representative image. Actual material appearance varies by grade and lot — request a current photograph or sample.
About this material
Two additives do most of the SEI work in modern lithium-ion cells. Vinylene carbonate polymerises on the graphite surface into a thin, flexible film that improves cycle life; fluoroethylene carbonate does the same for silicon and sodium anodes, where a LiF-rich interphase is more stable.
Dosage is narrow. One to three percent VC improves cycling; above five percent it raises impedance and generates gas at elevated temperature. FEC runs 2–5 percent in silicon-containing cells, and is essentially mandatory above 10 percent silicon.
Documentation, controls and care
Quality controls
- Certificate of analysis per batch
- Moisture by Karl Fischer, reported per lot
- Trace metal screening
- Retained samples held for 12 months
Handling & storage
- Both are moisture-sensitive liquids; dispense under argon into a septum vial.
- FEC is a fluorinated compound — avoid skin contact and use nitrile gloves plus a fume hood.
- Store away from light and oxidisers; VC polymerises slowly on prolonged air and light exposure.
Grades on this page are references used to describe capability; they are not a fixed product list.
Specification values are typical windows compiled from public technical references and supplier
datasheets, and are provided for selection guidance only. The specification delivered against your
order is agreed in writing, and measured values are confirmed on the batch certificate of analysis.
Materials listed here may be hazardous; they must be handled by qualified personnel under applicable
regulations.
Material specifications
| VC purity | ≥99.5% by GC |
|---|---|
| VC water content | ≤50 ppm |
| FEC purity | ≥99.9% by GC |
| FEC water content | ≤20 ppm |
| Appearance | Clear, colourless liquid |
| VC boiling point | 79–82 °C at 20 mmHg |
| FEC boiling point | 212 °C |
| Typical dosage | VC 1–3 wt%, FEC 2–5 wt% |
| Packaging | 100 mL / 500 mL / 1 L amber glass |
| Storage | Sealed under argon, 5–25 °C, away from light |
Grade & packaging options
Custom particle size or purity windows
Pilot and production quantities
Technical review call with our materials team
Supply boundaries
Reference grade, not a fixed catalogue item. Capacity, particle size, coating, purity and packaging are set to the specification your process needs — the delivered grade may differ from the values shown here.
Packaging & handling
Laboratory pack | 50 mL / 250 mL septum bottle
Pilot pack | 1 L / 5 L nitrogen-capped container
Production pack | 20 L drum, argon blanket
Information for material review
Cell chemistry, format and voltage window
Target capacity, areal loading or formulation
Process route — NMP/PVDF, aqueous, or dry
Quantity per lot, packing and delivery schedule
Training in China
Training at our China facility is available for this product. Scope, schedule and language are agreed for each project.
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