Category: 156783-96-9

Chen, Shijian published the artcileHigh-Efficiency Lithium Metal Anode Enabled by a Concentrated/Fluorinated Ester Electrolyte, Synthetic Route of 156783-96-9, the publication is ACS Applied Materials & Interfaces (2020), 12(24), 27794-27802, database is CAplus and MEDLINE.

Lithium (Li) metal anode (LMA) has received growing attention due to its highest theor. capacity (3860 mA h g^-1) and lowest redox potential (-3.04 V vs. standard hydrogen electrode). However, practical application of LMA is obstructed by the detrimental side reactions between Li metal and organic electrolytes, especially when cycled in traditional carbonate ester electrolytes. Herein, we propose a novel fluorinated carbonate ester-based electrolyte by combining di-Et fluorocarbonate (ETFEC) solvent and 5 M LiFSI concentration (M = mol L^-1). Using this electrolyte, an ultrahigh Li plating/stripping Coulombic efficiency (CE) of 99.1% can be obtained in Li||Cu cells and a stable cycle performance of Li||LiFePO₄ is achieved under the conditions of limited Li metal (5 mA h cm^-2), moderate loading LiFePO₄ (7-8 mg cm^-2), and lean electrolyte (40 uL). The fundamental functioning mechanism of this novel electrolyte has been carefully investigated by scanning electronic microscopy (SEM), operando optical microscopy (OM), electrochem. impedance spectroscopy (EIS), XPS, and solid state NMR (SS-NMR). The results demonstrate that this optimized electrolyte facilitates formation of a high Li⁺ conductive SEI layer enriched with LiF and inorganic sulfur-containing species, which can effectively suppress the side reactions between electrolyte and Li metal and prevent formation of dead Li.

ACS Applied Materials & Interfaces published new progress about 156783-96-9. 156783-96-9 belongs to esters-buliding-blocks, auxiliary class Trifluoromethylated Building Blocks, name is Ethyl (2,2,2-trifluoroethyl) carbonate, and the molecular formula is C5H7F3O3, Synthetic Route of 156783-96-9.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Smart, M. C. published the artcileImproved performance of lithium-ion cells with the use of fluorinated carbonate-based electrolytes, Safety of Ethyl (2,2,2-trifluoroethyl) carbonate, the publication is Journal of Power Sources (2003), 359-367, database is CAplus.

There is increasing interest in developing Li-ion electrolytes that possess enhanced safety characteristics, while still able to provide the desired stability and performance. Toward this end, efforts were focused on the development of Li-ion electrolytes which contain partially and fully fluorinated carbonate solvents. The advantage of using such solvents is that they possess the requisite stability demonstrated by the hydrocarbon-based carbonates, while also possessing more desirable phys. properties imparted by the presence of the F substituents, such as lower m.ps., increased stability toward oxidation, and favorable SEI film forming characteristics on C. The beneficial effect of electrolytes which contain the following fluorinated carbonate-based solvents:Me-2,2,2-trifluoroethyl carbonate (MTFEC),Et-2,2,2-trifluoroethyl carbonate (ETFEC), propyl-2,2,2-trifluoroethyl carbonate (PTFEC),Me-2,2,2,2′,2′,2′-hexafluoro-CHMe₂ carbonate (MHFPC),Et-2,2,2,2′,2′,2′-hexafluoroCHMe₂ carbonate (EHFPC), and di-2,2,2-trifluoroethyl carbonate (DTFEC) was demonstrated. These solvents were incorporated into multi-component ternary and quaternary carbonate-based electrolytes and evaluated in Li-C and C-LiNi_0.8Co_0.2O₂ cells, with Li reference electrodes. In addition to determining the charge/discharge behavior of these cells, Tafel polarization measurements, linear polarization measurements, and electrochem. impedance spectroscopy were used to further characterize the performance of these electrolytes, including the SEI formation characteristics and Li intercalation/de-intercalation kinetics.

Journal of Power Sources published new progress about 156783-96-9. 156783-96-9 belongs to esters-buliding-blocks, auxiliary class Trifluoromethylated Building Blocks, name is Ethyl (2,2,2-trifluoroethyl) carbonate, and the molecular formula is C9H9N3, Safety of Ethyl (2,2,2-trifluoroethyl) carbonate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Hamada, Tomohito published the artcileImproved Synthesis of Unsymmetrical Carbonate Derivatives Using Calcium Salts, Product Details of C5H7F3O3, the publication is Organic Process Research & Development (2019), 23(4), 667-673, database is CAplus.

An effective synthetic method for unsym. carbonate species has been developed. Calcium oxide and calcium hydroxide were found to be highly effective for this reaction, affording unsym. carbonates in high yield and purity. Calcium chloride, which is a coproduct, serves as a water scavenger that can be easily removed. Addnl. drying processes and complicated purification steps are not necessary in this reaction. This improved process is important in terms of green sustainable chem. principles.

Organic Process Research & Development published new progress about 156783-96-9. 156783-96-9 belongs to esters-buliding-blocks, auxiliary class Trifluoromethylated Building Blocks, name is Ethyl (2,2,2-trifluoroethyl) carbonate, and the molecular formula is C5H7F3O3, Product Details of C5H7F3O3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Krause, Frederick C. published the artcileScreening electrolytes designed for high voltage electrochemical capacitors, Recommanded Product: Ethyl (2,2,2-trifluoroethyl) carbonate, the publication is Electrochimica Acta (2021), 137898, database is CAplus.

Standard acetonitrile/tetraalkylammonium-tetrafluoroborate-based electrochem. capacitor electrolytes were modified with both fluorinated additives (including fluorinated analogs of ethylmethyl carbonate and di-Et carbonate, lithium difluoro(oxalato)borate, and tris(2,2,2-trifluoroethyl) phosphite) and spiro(1,1′)-bipyrrolidinium tetrafluoroborate salt, to improve stability at higher voltages (>2.7 V). Compounds investigated included (2,2,2-trifluoroethyl) Me carbonate (TFEMC), ethyl(2,2,2-trifluoroethyl) carbonate (ETFEC), bis(2,2,2-trifluoroethyl) carbonate (bTFEC), lithium difluoro(oxalato)borate (LiDFOB), and tris(2,2,2-trifluoroethyl) phosphite (TTFEPi). Screening of modified electrolytes in prototype coin cells using constant current cycling and voltage hold test protocols revealed good retention of capacitance and a reduced cell internal resistance growth when operating at maximum voltages between 3.5 and 4.0 V. These results suggest new strategies for increasing the operating limits of elec. double-layer type supercapacitors, to increase stored energy and improve their compatibility with lithium-ion battery cells for use in hybrid configurations.

Electrochimica Acta published new progress about 156783-96-9. 156783-96-9 belongs to esters-buliding-blocks, auxiliary class Trifluoromethylated Building Blocks, name is Ethyl (2,2,2-trifluoroethyl) carbonate, and the molecular formula is C5H7F3O3, Recommanded Product: Ethyl (2,2,2-trifluoroethyl) carbonate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

He, Meinan published the artcileFluorinated Electrolytes for 5-V Li-Ion Chemistry: Probing Voltage Stability of Electrolytes with Electrochemical Floating Test, SDS of cas: 156783-96-9, the publication is Journal of the Electrochemical Society (2015), 162(9), A1725-A1729, database is CAplus.

Electrolyte formulations containing fluorinated cyclic carbonates and fluorinated linear carbonates with LiPF₆ were evaluated as electrolyte solvents for high-voltage Li-ion batteries. The anodic stability of the new electrolytes on fully charged spinel LiNi_0.5Mn_1.5O₄ (LNMO) cathode was examined by electrochem. floating tests. The effects of F substitution on the cyclic and linear carbonate, ratio of cyclic vs. linear carbonate, and LiPF₆ concentration on the electrolyte oxidation stability were studied. Based on this study, the floating test proved to be an effective tool for identification of stable electrolyte materials.

Journal of the Electrochemical Society published new progress about 156783-96-9. 156783-96-9 belongs to esters-buliding-blocks, auxiliary class Trifluoromethylated Building Blocks, name is Ethyl (2,2,2-trifluoroethyl) carbonate, and the molecular formula is C5H7F3O3, SDS of cas: 156783-96-9.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Liu, Man published the artcileStructures and dynamic properties of the LiPF₆ electrolytic solution under electric fields – a theoretical study, Name: Ethyl (2,2,2-trifluoroethyl) carbonate, the publication is Physical Chemistry Chemical Physics (2019), 21(24), 13186-13193, database is CAplus and MEDLINE.

Fluorinated carbonates have attracted increasing attention in high-voltage lithium ion battery applications. Under free and elec. fields, their structure-related solvent dynamic properties such as charge and discharge rate, however, are rarely reported. Herein, solutions including linear fluorinated carbonates have been simulated using joint MD/DFT calculations For the first time, the dielec. constants of the four pure fluorinated carbonates have been predicted to be ca. 5.4 (4: ethyl-2,2,2-trifluoroethyl carbonate)-12.1 (7: di-1,1,2,2,2-pentafluoroethyl carbonate), which are dependent on the number of fluorine atoms. Minor difference in the solvation free energies and few contact ion associations were observed in the ETFEC and DTFEC solvents. Their comparable viscosity values were found through calculations of ion diffusivity and conductivity In the elec. fields, the Li⁺ mobilities in the two solutions have similar values, showing that the dynamic properties of the electrolytic solutions are almost independent of the number of fluorine atoms on these carbonates. There emerges an oriented and ordered arrangement of the solvent mols. and thus the largely decreased dielec. constants under the elec. fields, even though the field strength is very low. These interesting phenomena should be relevant in the formation of contact and aggregate ion pairs, leading to unexpected reduction of the charge-discharge rate-related ion mobility in mixed solvents.

Physical Chemistry Chemical Physics published new progress about 156783-96-9. 156783-96-9 belongs to esters-buliding-blocks, auxiliary class Trifluoromethylated Building Blocks, name is Ethyl (2,2,2-trifluoroethyl) carbonate, and the molecular formula is C5H7F3O3, Name: Ethyl (2,2,2-trifluoroethyl) carbonate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics