Thermal-assisted synthesis of reduced graphene oxide-embedded Ni nanoparticles as high-performance electrode material for supercapacitor

In this research, a thermally reduced graphene oxide/nickel (TrGO/Ni) nanocomposite was synthesized using a thermal-assisted method, and then it was coated on nickel foam (NF) as electrode material for supercapacitor. The internal and morphology of the nanocomposite were examined by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, and thermal gravimetrical inves-tigation. It contains specific capacity of 154.3 C g-1 at 2 mV s-1 in 1 M KOH and 90.2% capacitance retention after 2,000 cycles, the TrGO/Ni nanocomposite demonstrates superior electrochemical performance. According to electrochemical impedance and cyclic voltammetry measurements, the homogenous structure of the TrGO/Ni nanocomposite on NF, the quick ion transport across the electrode-electrolyte interface, and the low resistance contribute to the improved electrochemical efficiency. This strategy can promote the development of hybrid nanostructures and their applications in high-performance reversible supercapacitors with low cost and easy preparation procedures.

Automated summary

In this study, a thermally reduced graphene oxide/nickel nanocomposite was synthesized and coated on nickel foam as electrode material for supercapacitors. The nanocomposite exhibited specific capacity of 154.3 C g-1 and 90.2% capacitance retention after 2,000 cycles in 1 M KOH. The superior electrochemical performance of the TrGO/Ni nanocomposite was attributed to its homogenous structure, quick ion transport, and low resistance.