BFEC {Bis(2-fluoroethyl) Carbonate, 99.0%} as Battery Electrolyte Additive, 10 g/bottle, CBEABFEC

BFEC {Bis(2-fluoroethyl) Carbonate is a recently developed fluorinated linear carbonate used as a high-performance electrolyte additive in advanced lithium-ion batteries (LIBs), particularly for stabilizing the high-capacity lithium-metal anode. BFEC is a sacrificial additive that preferentially decomposes on the highly reactive lithium metal anode surface during the first few cycles. The decomposition of BFEC releases fluorine, which facilitates the formation of a Lithium Fluoride (LiF)-rich SEI layer. Moreover, BFEC has been shown to improve the performance of full cells pairing the Li metal anode with high-voltage cathodes, such as NCM622. 

Part Number	CBEABFEC (C-BEA-BFEC)
CAS	406-15-5
Chemical Formula	C5H8F2O3
Appearance	Colorless Liquid
Purity	>99.0%
Molecular Weight	154.11 g/mol
Density	1.169 g/cm3
Boiling Point	~157.4 °C
Package Size	10 g/bottle

Notes: Please try to store the BFEC solution in the glovebox.

References: 

1. J. Han, et al. A Bis(2-fluoroethyl) Carbonate as a New Electrolyte Additive for Enhancing the Long-Term Cycle Performance of Li-Metal Batteries, J. Electrochem. Soc., 2023, 170, 020529.
2. Y. Wang, et al. Fluorination in advanced battery design, Nature Reviews Materials, 2024, 9, 119-133.