MODIFICATION OF GRAPHENE OXIDE AND PREPARATION OF RUO2 NANOCOMPOSITES | Journal of Applied......

The Hummers' method was used to make graphene-oxide (G). Using chloroacetic acid and G, a G-COOH layer was created. RuO2 nanoparticles were produced on graphene layers using a one-step thermal technique, -COOH(G-COOH), and RuCl3 to fabricate carboxylated graphene-RuO2 (G-COORu) nanocomposites. X-ray diffraction, transmission electron microscopy, scanning electron microscopy, 13C-nuclear magnetic resonance, X-ray photoelectron, Fourier-transform infrared spectroscopy, and Raman were all used to characterise the materials. Electrochemical impedance spectroscopy, cyclic voltammetry, constant current charge–discharge experiments, and Nyquist impedance plots were used to investigate the electrochemical characteristics of the G-COORu supercapacitors. Within the potential range of 0–1.0 V, the supercapacitors have a specific capacitance of 125 F g-1 at 100 mA cm-2. The method shown here is a straightforward way for depositing RuO2 nanoparticles on graphene layers, and it can be expanded to fabricate additional types of hybrids based on G layers for specific technical purposes.

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