| 초록 |
This work describes solid-state asymmetric supercapacitors (ASCs), composed of aniline oligomers as a cathode, reduced graphene sheet as an anode and sealed with solid electrolyte. This research clarifies the synergetic effects on electrical and electrochemical performances resulting from of combination between aniline oligomers and water-dispersible graphene (WDG) sheet. The electrical and electrochemical properties of ASCs were highly dependent on the protonation levels of aniline oligomers including aniline tetramer, aniline trimer, and aniline dimer. The aniline tetramer with an appropriate chain length provided sufficient carrier transport within the cathode compared to the other oligomers. The ASC composed of aniline tetramer/WDG exhibited high areal capacitance (62.2 mF/cm2), volumetric capacitance (207.4 F/cm3), and good cycling stability (97.2% after 2000 cycles and 90.4% after 10000 cycles). |
