Diethyl Carbonate Battery Grade (DEC)
CAS Number: 105-58-8
Battery-grade diethyl carbonate (DEC) is a low-viscosity co-solvent used in EC/DEC electrolyte systems for standard cylindrical and prismatic lithium-ion cells. Its moderate boiling point (127°C) and low viscosity provide a balance of safety and ionic conductivity in commercial electrolyte blends.
Technical Specifications
| appearance | Colorless transparent liquid |
| purity (%) | ≥99.95 |
| color (APHA) | ≤10 |
| moisture (ppm) | ≤20 |
| density (g/mL, 20°C) | 0.975–0.977 |
| acidity as HCOOH (ppm) | ≤5 |
Applications
- EC/DEC (1:1 or 1:2) binary electrolyte for cylindrical cells
- Ternary electrolyte solvent blend (EC/DMC/DEC)
- Low-temperature electrolyte formulation co-solvent
- Electrolyte for lithium manganese oxide cells
- Solvent in specialty polymer dissolution for battery coatings
Key Features
- Moderate boiling point (127°C) balances safety margin with electrolyte wettability
- Low freezing point (-43°C) extends operational temperature range
- Ultra-low moisture content (<20 ppm) preserves electrolyte salt integrity
- Compatible with all major lithium salts: LiPF6, LiBF4, LiTFSI
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