Diaminopyrene modified reduced graphene oxide as a novel electrode material for excellent performance supercapacitors

In this paper, novel reduced graphene oxide (rGO) composites (DAPrGOs) modified by diaminopyrene (DAP) were successfully synthesized via a facile solvothermal reaction method and used for supercapacitors. Compared with the pristine rGO, the DAPrGO1 electrode showed distinctly better performance (397.63 F g(−1)vs. 80.29 F g(−1) of pristine rGO at 0.5 A g(−1)) with small charge transfer resistance. When a symmetric device was fabricated using DAPrGO1 as the active material, it also exhibited a high capacitance of 82.70 F g(−1) at 0.5 A g(−1) with an energy density of 25.84 W h kg(−1) at a power density of 375 W kg(−1), and even offered a high power density of 7500 W kg(−1) (18.71 W h kg(−1)) at 10 A g(−1). Moreover, the device possessed good electrochemical stability up to 20 000 cycles, implying promising applications in energy storage fields.