CAS:406-95-1，2,2,2-Trifluoroethyl acetate(TFA)

The invention relates to an electrochemical cell comprising: —at least one anode comprising metallic lithium or a lithium alloy or at least one anode comprising a current collector at least partially covered with metallic lithium deposited after at least one charge of the cell, the cell not containing metallic lithium at the time of its manufacture, —at least one cathode, - a liquid or gelled electrolyte composition comprising: a) a solvent comprising: i) either a mixture of 1,1,1,3,3,3-hexafluoro-2-methoxypropane (HFMP) and/or 1,1,1,3,3,3-hexafluoro-2-(fluoromethoxy)propane (HFMFP), ethylene monofluorocarbonate (F1EC) and 2,2,2-trifluoroethyl methyl carbonate (F3EMC), ii) or a mixture of 1,1,1,3,3,3-hexafluoro-2-methoxypropane (HFMP) and/or 1,1,1,3,3,3-hexafluo-ro-2-(fluoromethoxy)propane (HFMFP), ethylene monofluorocarbonate (F1EC) and 2,2,2-trifluoroethyl acetate (F3EA), b) at least one salt whose cation is the lithium cation, c) lithium difluorophosphate LiPO2F2 in an amount representing from 0.05 to 5% of the mass of the combination made up of the solvent and said at least one dissolved lithium salt.

The present invention relates to a bifunctional co-solvent wide-temperature lithium-ion battery electrolyte and its application, and the wide-temperature lithium-ion battery electrolyte is composed of lithium salt, organic solvent, thionyl chloride, tris(trimethylsilane) phosphate, additives. The lithium-ion battery prepared by the bifunctional co-solvent wide-temperature electrolyte described in the present invention effectively broadens the range of temperature use, improves the high-temperature cycle performance and low-temperature discharge of the battery, has the characteristics of wide temperature working range, high specific energy and long cycle life, and has excellent thermal stability and good safety performance.

A method for the preparation of certain intermediates (e.g., the following compounds: (I)) is disclosed that can be used to prepare BTK inhibitors, such as ibrutinib.