Fluoroethylene carbonate is a chemical substance and the main electrolyte additive for lithium ion batteries. SEI film has better performance, forming a dense structural layer without increasing impedance, which can prevent further decomposition of electrolyte and improve its low temperature performance.
Electrolyte additives for lithium ion batteries are used to improve the capacity, cycle life and low temperature performance of batteries. FEC is stable in pure substance state, and it is sensitive to temperature when dissolved in electrolyte, so the temperature should be strictly controlled.
Basic information
Chinese alias: 4- fluoro-1, 3- dioxolane -2- one
English name: fluoroethylene carbonate
English alias: 4- fluoro-1, 3- dioxolane -2- one
Si Nuo. : 1 14435-02-8
Molecular formula: C3H3FO3
Molecular weight: 106.05
Purity: ≥98.0%
No. :MFCD06247543
Role description
Colorless transparent liquid
physical parameter
Density:1.454g/ml.
Melting point: 18℃
Boiling point: 249℃
Flash point: 120℃
use
The main electrolyte additive of the lithium ion battery has better performance in forming SEI film, forms a compact structural layer without increasing impedance, can prevent the electrolyte from being further decomposed, and improves the low-temperature performance of the electrolyte.