96-49-1 | Ethylene carbonate

Chemical type

• Cyclic carbonate
• Organic solvent

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• Cyclic organic carbonate (high-boiling electrolyte solvent)

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Key properties

• High dielectric constant
• Reduces at ≈3.1 V on anode surfaces
• LUMO energy of -0.17 eV
• Forms part of baseline electrolyte mixtures
• Decomposition suppressed by additives like FEC and SD

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• High polarity and reactivity
• Strong thermal stability at elevated temperatures
• High boiling point (suitable for recovery via distillation)
• Can be recovered with high purity (~96.9%)

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• Co-solvent (3:7 wt. with EMC) in LiPF₆-based electrolytes
• Supports SEI formation in LIBs
• Avoided in EC-free formulations for improved stability

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• Raw material for biodegradable polyester synthesis (PES, PESG)
• Electrolyte solvent in lithium-ion batteries
• Intermediate for polymer production

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Classification by use

• Battery electrolyte solvents
• Components for high-permittivity mixtures

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1. [Cite:1] Sulfonyl diimidazole to stabilize fluoroethylene carbonate-based SEI in high-voltage Li ion cells with a SiOx containing negative electrode, Energy Storage Materials, Volume 72, September 2024, 103735
2. [Cite:2] Valorization of ethylene carbonate recovered from spent lithium-ion battery electrolytes: synthesis and properties of biodegradable poly ethylene succinate-co-ethylene glycol (PESG) copolyesters; RSC Advances, Volume 16, Issue 7, 3 February 2026, Pages 5785-5794