Ethylene Carbonate (EC) is a high permittivity organic solvent with remarkable dielectric properties of great appeal in the electrolytes of lithium-ion batteries. Having the reputation of being able to grow a robust Solid Electrolyte Interphase (SEI) over graphite anodes, EC becomes critical in making batteries safer, more efficient, and with a longer life. As a co-solvent in electrolyte preparation, it facilitates optimal lithium-ion flow and increases cell stability.
This tranquility is the ultimate value in thermally stable and safe energy storage for Ethylene Carbonate. It is often combined with low viscous solvents, such as Dimethyl Carbonate (DMC), which offer an excellent bond between ionic conductivity and viscosity. Under the rapid growth of demand for solutions to store energy in electric vehicles, consumer electronics, and renewable energy grids, EC has remained a key component involved in the delivery of reliable and long-lasting power storage systems that are high-performing.
| Property | Details |
|---|---|
| Chemical Formula | C3H4O3 |
| Molecular Weight | 88.06 g/mol |
| Appearance | White crystalline solid |
| Purity | ≥ 99.9% |
| Melting Point | 34–38°C |
| Boiling Point | 248°C |
| Density (at 20°C) | 1.32 g/cm³ |
| Flash Point | 160°C (Closed cup) |
| Solubility | Soluble in organic solvents, limited solubility in water |
| Reactivity | Stable under normal conditions; avoid strong oxidizers |
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EC is a crucial solvent with a high dielectric constant that dissolves lithium salts. It is essential for forming a high-quality Solid Electrolyte Interphase (SEI) layer on the graphite anode, preventing electrolyte decomposition.
At room temperature (below 34–38°C), EC is a white, odorless crystalline solid. It melts into a clear, colorless liquid just above room temperature.
The CAS number is 96-49-1, its molecular formula is C₃H₄O₃, and its molecular weight is 88.06 g/mol.
No, because EC has a relatively high melting point (36°C) and high viscosity. It is always blended with low-viscosity linear co-solvents like Dimethyl Carbonate (DMC) or Ethyl Methyl Carbonate (EMC).
It causes skin and eye irritation. Use protective gloves and goggles, avoid breathing dust/fumes, and store in cool, dry, well-ventilated conditions.