期刊
ELECTROCHIMICA ACTA
卷 463, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2023.142814
关键词
TrGO; Ni nanocomposite; Nickel foam; Electrochemical deposition; Specific capacity; Pseudocapacitors
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.
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.
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