The 1 -ethyl -3 -methyllimidazolium hexafluorophosphate with the potential application value was selected as supercapacitor electrolyte, and investigated in a symmetrical supercapacitor using activated carbon as electrodes. The electrochemical analysis of the simulated supercapacitor was examined using an AC impedance, a cyclic voltammetry, and constant current charging/discharging tests, meanwhile compared with the other two hexafluorophosphate. According to the results, the 1 -ethyl -3 -methyllimidazolium hexafluorophosphate has the better electrochemical performance than Triethylmethylammonium hexafluorophosphate and N- methy -N -ethylMorpboline hexafluorophosphate by these electrochemical analysis. The supercapacitor also has better reversibility, cyclic characteristics and steady charging/discharging properties.%采用一种具有潜在应用价值的1-乙基-3-甲基咪唑六氟磷酸盐作超级电容器的电解液,与活性炭电极组装成模拟超级电容器,与其他两种有机电解液进行循环伏安、恒流充放电、交流阻抗等电化学性能的比较.结果显示,1-乙基-3-甲基咪唑六氟磷酸酸盐(FMI-PF6)在循环性能、恒流充放电及高电压放电等方面优于甲基三乙基铵六氟磷酸盐(N1,2,2,2-PF6)及N-甲基-N-乙基-吗啡啉六氟磷酸盐(N1,2M-PF6).EMI-PF6超级电容器具有良好的可逆性、循环特性及稳定的充放电性能,较适宜作为超级电的容器电解液.
展开▼
