409071-16-5Relevant articles and documents
Characterisation and properties of new ionic liquids with the difluoromono[1,2-oxalato(2-)-O,O′]borate anion
Herzig, Tobias,Schreiner, Christian,Gerhard, Dirk,Wasserscheid, Peter,Gores, Heiner Jakob
, p. 612 - 618 (2007)
Three ionic liquids with borate anions of low symmetry, tetraethylammonium difluoromono[1,2-oxalato(2-)-O,O′]borate, 1-ethyl-3-methylimidazolium difluoromono[1,2-oxalato(2-)-O,O′]borate, and 1-butyl-3-methylimidazolium difluoromono[1,2-oxalato(2-)-O,O′]borate were synthesised and characterised by physicochemical and electrochemical measurements including thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), cyclic voltammetry (CV), viscosity and conductivity measurements.
Preparation method of lithium difluorooxalate borate
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Paragraph 0031-0033, (2020/12/09)
The invention discloses a preparation method of lithium difluorooxalate borate. The preparation method comprises the following steps: (1) placing anhydrous oxalic acid and anhydrous lithium chloride in a reaction vessel, adding an aprotic polar solvent to the reaction vessel under a nitrogen atmosphere, conducting reaction at 10-80 DEG C under a stirring condition for 1-12 h; reacting anhydrous oxalic acid with anhydrous lithium chloride to produce lithium hydrogen oxalate; (2) adding a boron trifluoride compound to the reaction vessel, continuing reaction for 1-12 h to produce lithium difluorooxalate borate; and (3) filtering a reaction solution after the reaction in step (2) at room temperature to remove solid raw materials which not completely react, and then concentrating and recrystallizing a filtrate obtained after filtration, then performing washing and filtration with a non-polar solvent, and finally, carrying out drying to obtain a solid lithium difluorooxalate borate product.The method is mild in reaction, simple in process, low in production cost, economical and environmentally friendly, can obtain high-purity lithium difluorooxalate borate, and is more suitable for industrial production.
Method for synthesizing lithium difluorooxalate borate by one-pot method
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Paragraph 0024; 0025; 0026; 0028; 0031, (2019/02/06)
The invention discloses a method for synthesizing lithium difluorooxalate borate by a one-pot method. The method is characterized by comprising the following steps: 1) preparation of lithium tetrafluoroborate: reacting lithium fluoride and boron trifluoride to prepare lithium tetrafluoroborate; 2) preparation of crude lithium difluorooxalate borate: reacting the obtained lithium tetrafluoroboratewith oxalic acid to obtain the crude lithium difluorooxalate borate; 3) preparation of electronic grade difluorooxalate borate: recrystallizing the crude lithium difluorooxalate borate by an organic solvent, washing and drying to obtain the electronic grade lithium difluorooxalate borate. The method for synthesizing the lithium difluorooxalate borate by the one-pot method has the beneficial effects that crystal obtained by the method disclosed by the invention has higher quality, the content is greater than 99.8%, and no sulfate ion exists.