Microwave-assisted fabrication of high-performance supercapacitors based on electrodes composed of cobalt oxide decorated with reduced graphene oxide and carbon dots

• Microwave-assisted cobalt oxide (Co 3 O 4 ) based nanocomposite electrodes doped with carbon dots and reduced graphene oxide. The dot containing enables the highest specific capacitance of 936 Fg ?1 at 0.5 Ag current density. cyclic stability is reasonably high, retain 93%, 87%, 88% their initial after 10,000 cycles for Co , @RGO, @RGO@CDs. optimized @RGO@CDs were used to fabricate a symmetric supercapacitor that exhibits high (126 0.25 long cycle life (%81 retention cycles). fabricated has energy density 17.5 Wh kg power 2522 W . This study presents microwave-assisted preparation calcination precursors 400 °C 2 h results in nanocomposites. A three-electrode cell 2M KOH solution electrochemical measurements. Specific capacitances pure 4, @RGO are 448 482 good rate capability even 10 respectively. @RGO@CDs, outstanding demonstrate promise transition metal oxides-based nanoparticles as promising applications.