The using of carbon nanotube and graphene oxide composition in making graphene based supercapacitor and the influence of electrochemical reduction

The composition of graphene and carbon nanotube was used as a considerable key element in the preparation of double-layer super capacitor electrodes where the thickness of the electrode was only a few micrometers. The resultant electrodes showed different specific capacitances after pre-reduction with scanning potential windows of -1.5 to 0 V. Also, a specific capacitance of 133 F/g was obtained as the carbon nanotube and graphene oxide (CNTs/GO) electrode that was reduced with an applied potential for 4000s. This specific capacitance was achieved at 5 mV/s. The influences of the residual oxygen functional groups in electrochemically reduced graphene were determined for capacitance and stability performance by CV test. The supercapacitor was shown to be stable after 4000 charge/discharge cycles.

کلیدواژه ها:

graphene ، carbon nanotube ، super capacitor ، electrochemical reduction ، CV curves