Fabrication of composite GO/NiFe2O4-MnFe2O4-CoFe2O4 anode material: Toward high performance hybrid supercapacitors

Here, NiFe₂O₄, MnFe₂O₄, and CoFe₂O₄ nanoferrites are prepared by coprecipitation synthesis technique from nickel, manganese, and cobalt chloride precursors. Synthesized nanoferrites are annealed by calcination process at 800°C for 2 h. To produce a novel anode electrode material for asymmetric supercapacitors (ASCs), the composite material of GO/NiFe₂O₄-MnFe₂O₄-CoFe₂O₄ is fabricated. Physicochemical aspects of the synthesized nanoferrites are evaluated. X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and x-ray photoelectron spectroscopy tests are conducted, respectively. The electrochemical activities are studied by cyclic voltammetry, glavanostatic charge–discharge, and electrochemical impedance spectroscopy (EIS) in 2 M KOH as the electrolyte. In three electrode system, the novel GO/NiFe₂O₄-MnFe₂O₄-CoFe₂O₄ electrode displays a high specific capacity of 325 C g⁻¹ and preserves about 99.9% of its initial specific capacity. The GO/NiFe₂O₄-MnFe₂O₄-CoFe₂O₄//GO ASCs device is assembled using GO/NiFe₂O₄-MnFe₂O₄-CoFe₂O₄, GO, and 2 M KOH solution as the positive electrode, negative electrode, and electrolyte, respectively. Significantly, the GO/NiFe₂O₄-MnFe₂O₄-CoFe₂O₄//GO ASCs represent an outstanding energy density of 50.5 W h kg⁻¹ at power density of 2560 W kg⁻¹. Through the long-term charge discharge cycling tests, this ASC device illustrates about 93.7% capacity retention after 3000 cycles. Then, the present study provides the NiFe₂O₄-MnFe₂O₄-CoFe₂O₄ composite nanoferrites as a novel favorable candidate for anode material.

Research Highlights

• Simple and green synthesis of magnetic NiCo₂O₄/NiO/rGO composite nanostructure using natural precursor.
• Fabricating and designing an efficient semiconductor for degradation ability.
• NiCo₂O₄/NiO/rGO nanocomposite with advanced photo elimination catalytic routine.
• The photocatalytic performance of NiCo₂O₄/NiO/rGO was surveyed for the degradation of various antibiotics below visible radiation.
• Efficiency was 92.9% to eliminate tetracycline.

We developed a synergetic approach to prepare a novel active material composed of GO/ NiFe2O4-MnFe2O4-CoFe2O4 by a hybrid electrode material. Green synthesis method was accomplished to attain NiCo₂O₄/NiO/rGO nanocomposite with advanced photo elimination catalytic routine. The oxide nanobundles were prepared with a rapid and eco-friendly method. In order to investigation of the effect of natural precursor, morphology and shape of nanoproducts was compared. NiCo₂O₄/NiO/rGO nanobundles possess a suitable bandgap in the visible area.