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The ionic liquid is by a single Yin , cationic composition, the substance that is liquid at room temperature or near room temperature . In recent years , ionic liquids has the advantage of low volatility , flame resistance , the use of a wide temperature range , good chemical and electrochemical stability , by the close attention of the scientific community , is considered as the emerging security electrolyte material and replace the traditional electrolyte material , widely used in the lithium secondary battery, in areas such as solar cells, electrochemical capacitors . In this paper , the authors sulfide raw materials , design and synthesis of a series of trialkyl sulfonium cations ( [ R1R2R3S ] of R1 , R2, R3 = CH3 or C2H5 , R3 = CH2CH2OCH3 , CH2CH2COOCH3 ) , and synthetic sulfonium salts and perfluoroalkyl borate anion of the potassium salt (K [C2F5BF3]) as the raw material by the ion exchange reaction to prepare 16 kinds of novel ionic liquids , by 1H NMR, 19F NMR and elemental analysis by means of ionic liquids the chemical structure was confirmed by characterization and discussion of the system , after which their various physical and chemical properties ( such as melting point, glass transition temperature , the viscosity , electrical conductivity , thermal stability , electrochemical window) . In the synthesis of these compounds , some of the ionic liquids exhibit a low melting point , low viscosity, high electrical conductivity , etc. , at room temperature is a solid and exhibits a plastic crystal , ion Shaping crystal compound . These novel ionic liquids these excellent characteristics of the present work prepared shows good prospect as a new electrolyte material .
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