通过两步法合成了三种新型“绿色”功能性离子液体电解质(液)1-烷基-3-甲基咪唑硫氰酸盐([C3-5mim][SCN]),测定了离子液体的特征红外光谱和电导率。以离子液体作为超级电容器的工作电解液,采用循环伏安、交流阻抗、恒流充放电等方法研究了其电化学性能。结果表明:咪唑阳离子上具有较短烷基侧链的离子液体表现出更好的电化学稳定性及综合性能,具有成为新一代高性能超级电容器电解质(液)的应用潜力。 Three novel “green” functional ionic liquid electrolytes, 1-alkyl-3-methylimidazolium thiocyanate ([C3-5mim] [SCN]) were synthesized by a two- Characteristics of Liquids Infrared Spectroscopy and Conductivity. Using ionic liquid as the working electrolyte of supercapacitor, the electrochemical performance was studied by cyclic voltammetry, AC impedance and constant current charge-discharge method. The results show that ionic liquids with shorter alkyl side chains on imidazolium cation show better electrochemical stability and overall performance, and have the potential to become a new generation of high performance supercapacitor electrolyte (liquid).