ZIF-67/rGO/NiPc composite electrode material for high-performance asymmetric supercapacitors

In this reported study, novel multiple dimensional ZIF-67/rGO/NiPc composite materials were prepared for supercapacitors. The electrochemical test showed that the ZIF-67/rGO/NiPc electrode achieved a remarkable specific capacitance of 860 F g(-1) at a current density of 1 A g(-1), which was superior to that of the rGO/NiPc and ZIF-67/rGO electrodes. An asymmetric supercapacitor based on ZIF-67/rGO/NiPc//activated carbon exhibited a high specific capacitance of 200.67 F g(-1) and an extraordinary energy density of 62.7 Wh kg(-1) at a corresponding power density of 750 W kg(-1). In addition, the device demonstrated 94.6% capacitance retention after 5000 cycles. The assembled asymmetric supercapacitors could easily powered a green light-emitting diode. This work revealed a promising research route for the rational construction of multiple dimensioned high-performance electrodes materials for use in new energy storage devices.

Automated summary

In this reported study, novel multiple dimensional ZIF-67/rGO/NiPc composite materials were prepared and applied in supercapacitors. The electrochemical test results showed excellent specific capacitance of the composite material electrode at a high current density, and it also exhibited high cyclability. In addition, the asymmetric supercapacitor based on the composite material demonstrated outstanding specific capacitance and energy density.