114435-02-8 | Fluoroethylene carbonate

Chemical type

• Fluorinated cyclic carbonate
• Electrolyte additive for lithium-ion batteries

Key properties

• Promotes formation of LiF-rich solid electrolyte interphase (SEI) on anode
• Enhances CEI formation on cathode when combined with Al(PO₃)₃
• Improves interfacial stability at high voltage and temperature

• Forms effective, robust SEI on SiOₓ-containing anodes
• Reduction potential of 0.2-0.3 V vs. Li/Li⁺
• LUMO energy of -0.7 eV
• Unstable in presence of transition metals, leading to decomposition and HF formation
• Prevents EC decomposition when used at sufficient concentration (e.g., 5 wt.%)
• Contributes to inorganic-rich SEI/CEI

• Anode SEI-forming additive
• Cathode CEI co-additive for synergistic protection

• Additive in LiPF₆/EC/EMC electrolytes for SiOₓ-Gr anodes
• Stabilizes SEI in high-voltage LIBs when paired with Sulfonyl diimidazole
• Suppresses lithium metal plating and capacity fade
• Employed at 5 wt.% in formulations for NMC811 | SiOₓ-Gr cells

Classification by use

• Electrolyte additives for lithium-ion batteries
• Chemicals used to suppress lithium dendrite growth

• SEI-forming additives
• Electrolyte components for silicon-based anodes
• Additives for high-voltage battery applications

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1. [Cite:1] Aluminum metaphosphate-derived CEI suppresses interfacial degradation of NCM811 at 4.5 V and 60 °C, Electrochemistry Communications, Volume 184, March 2026, 108114
2. [Cite:2] Sulfonyl diimidazole to stabilize fluoroEthyl methyl carbonate-based SEI in high-voltage Li ion cells with a SiOx containing negative electrode, Energy Storage Materials, Volume 72, September 2024, 103735