156783-96-9 | Ethyl 2,2,2-trifluoroethyl carbonate

CAS:156783-96-9 | Ethyl 2,2,2-trifluoroethyl carbonate ,Description

Ethyl 2,2,2-trifluoroethyl carbonate (ETFC) is a fluorinated organic compound with a wide range of applications in the laboratory and in scientific research. It is a colorless, odorless liquid with a boiling point of 77 °C and a melting point of -78 °C. ETFC is used as a solvent for organic synthesis, as a reagent for the synthesis of organofluorines, and as a catalyst for a variety of chemical reactions. It is also used in the production of pharmaceuticals, agrochemicals, and other specialty chemicals.
 

Scientific Research Applications

Application in Lithium-Ion Batteries

Ethyl 2,2,2-trifluoroethyl carbonate (ETFEC) has been investigated for its potential in enhancing the performance of lithium-ion batteries. Research demonstrates that ETFEC, when used as a solvent component in high-voltage electrolytes, notably improves the self-discharge behavior and high-temperature cycle performance of lithium-ion batteries. For instance, adding a small percentage of ETFEC to conventional carbonate electrolytes has resulted in significant improvements in capacity retention, even under challenging conditions like high temperatures. The stability of ETFEC is a key factor here, preventing extensive oxidation of the electrolyte on the cathode surface and aiding in the formation of effective cathode/electrolyte interphase (CEI) films (Zheng et al., 2020).

Enhancing Safety Characteristics of Electrolytes

ETFEC's unique properties, such as lower melting points and increased stability toward oxidation, make it an attractive component for developing lithium-ion electrolytes with enhanced safety characteristics. Incorporating ETFEC and other fluorinated carbonates into multi-component carbonate-based electrolytes has been shown to beneficially affect the charge/discharge behavior, SEI formation, and lithium intercalation/de-intercalation kinetics in lithium-ion cells (Smart et al., 2003).

Role in Non-Flammable Electrolytes

Further extending its utility in lithium-ion batteries, ETFEC is also studied for its role in formulating nonflammable electrolytes. Its inclusion in electrolyte formulations has shown promise in substantially reducing flammability at a minimal loss in ionic conductivity. This quality of ETFEC enhances the safety profile of lithium-ion batteries, making them more viable for various applications (Zhang et al., 2003).

Application in High-Performance Gel Electrolytes

ETFEC's role is not limited to liquid electrolytes. It has also been utilized in the development of high-performance gel electrolytes for lithium-ion batteries. Gel electrolytes containing ETFEC exhibit high ionic conductivity and good reversibility, making them suitable for use in batteries with graphite negative electrodes. The nonflammability of these gel electrolytes further contributes to the overall safety of the battery systems (Hazama et al., 2015).

Contribution to Electrolyte Stability and Energy Density

Innovative formulations that exclude traditional components like ethylene carbonate and instead use ETFEC have shown to improve the performance of lithium-ion batteries. These formulations lead to low impedance, reduced electrolyte oxidation, efficient graphite passivation, and increased energy density, suggesting new avenues for electrolyte development (Petibon et al., 2016).

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