功能性离子液体[C_nmim][SCN]的超电容性质研究  

Super capacitance performance of functional ionic liquids [C_nmim][SCN]

作　　者：张庆国[1,2] 张鑫源[1] 李美超[1] 武宣宇[1] 金振兴[1,2] 

机构地区：[1]渤海大学化学化工与食品安全学院,辽宁锦州121013 [2]渤海大学超级电容器工程技术研究中心,辽宁锦州121013

出　　处：《电子元件与材料》2014年第6期19-22,27,共5页Electronic Components And Materials

基　　金：国家自然科学基金资助项目(No.21003081;No.21373002;No.21206083.);辽宁省高校优秀人才支持计划资助项目(No.LJQ2013116)

摘　　要：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 kinds of ＂green＂ functional ionic liquids （ILs） electrolytes 1-alkyl-3-methylimidazolium thiocyanate （[C3-5mim][SCN]） were synthesized by two-step method. The infrared spectroscopy and conductivity of the ILs were determined. Further, the electrochemical performances of supercapacitors with ILs as electrolytes were investigated through the methods of cyclic voltammetry, AC impedance, and constant current charging/discharging tests. The results show that the ionic liquid with shorter alkyl chain on the imidazolium cation possesses better electrochemical performance and stability, which provides a new family of high performance electrolyte for supercapacitor.

关 键 词：超级电容器 硫氰酸根 离子液体 电解质 电导率 烷基侧链 

分 类 号：O646[理学—物理化学]