| 초록 |
Graphenes have been regarded as potential capacitive materials because of superior electrical properties, large surface area, and chemical and mechanical stability. However, a major challenge of graphene-based materials for practical applications is still posed by the poor processibility attributable to the aggregation of sheets and the limited capacitance by means of the nonfaradaic energy storage mechanism. Herein, we report the functionalization of reduced graphene oxides (RGOs) by pyridinium-based ionic liquids (ILs) with SCN anions for applications into SC electrodes. The IL-functionalized RGO electrodes showed 4-fold higher capacitance compared to that of RGO and good rate capability and cycle stability despite the appearance of pseudocapacitance. The ILfunctionalized RGO electrodes were comprehensively characterized and the influence of alkyl chain length of ILs on the electrode performance was extensively investigated. |
