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• W4225550814 endingPage "104103" @default.
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• W4225550814 abstract "• Microwave-assisted cobalt oxide (Co 3 O 4 ) based nanocomposite electrodes doped with carbon dots and reduced graphene oxide. • The carbon dot containing electrodes enables the highest specific capacitance of 936 Fg −1 at 0.5 Ag −1 current density. • The cyclic stability of the electrodes is reasonably high, and the electrodes retain 93%, 87%, and 88% of their initial capacitance after 10,000 cycles for Co 3 O 4 , Co 3 O 4 @RGO, and Co 3 O 4 @RGO@CDs. • The optimized Co 3 O 4 @RGO@CDs electrodes were used to fabricate a symmetric supercapacitor that exhibits high specific capacitance (126 Fg −1 0.25 Ag −1 ) and long cycle life (%81 retention after 10,000 cycles). • The fabricated supercapacitor has energy density of 17.5 Wh kg −1 and power density of 2522 W kg −1 . This study presents microwave-assisted preparation of cobalt oxide (Co 3 O 4 ) based nanocomposite electrodes doped with carbon dots and reduced graphene oxide. The calcination of the precursors at 400 °C for 2 h results in nanocomposites. A three-electrode cell in 2M KOH solution is used for the electrochemical measurements. The carbon dot containing electrodes enables the highest specific capacitance of 936 Fg −1 at 0.5 Ag −1 current density. Specific capacitances of pure Co 3 O 4, and Co 3 O 4 @RGO electrodes are 448 Fg −1 and 482 Fg −1 at 0.5 Ag −1 , with good rate capability even at 10 Ag −1 , respectively. The cyclic stability of the electrodes is reasonably high and the electrodes retain 93%, 87%, and 88% of their initial capacitance after 10,000 cycles for Co 3 O 4 , Co 3 O 4 @RGO, and Co 3 O 4 @RGO@CDs, respectively. The optimized Co 3 O 4 @RGO@CDs electrodes were used to fabricate a symmetric supercapacitor that exhibits high specific capacitance (126 Fg −1 0.25 Ag −1 ) and long cycle life (%81 retention after 10,000 cycles). The fabricated supercapacitor has energy density of 17.5 Wh kg −1 and power density of 2522 W kg −1 . The outstanding results demonstrate the promise of carbon dots doped transition metal oxides-based nanoparticles as promising electrodes for supercapacitor applications." @default.
• W4225550814 created "2022-05-05" @default.
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• W4225550814 date "2022-05-01" @default.
• W4225550814 modified "2023-10-15" @default.
• W4225550814 title "Microwave-assisted fabrication of high-performance supercapacitors based on electrodes composed of cobalt oxide decorated with reduced graphene oxide and carbon dots" @default.
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• W4225550814 doi "https://doi.org/10.1016/j.est.2022.104103" @default.
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