The Graphene/Fe₃O₄ Nanocomposites as Electrode Materials of Supercapacitors

Abstract

The graphene/Fe3O4 (GN/Fe3O4) nanocomposites used as electrode of supercapacitors were prepared by chemical reduction-high temperature treatment. The Fe3O4 with uniform size regularly decorate on the surface of graphene. According to the charge and discharge test, the GN/Fe3O4-0.05 electrode has the good mass specific capacitance (265.6 F/g) at a current density of 0.5 A/g. When the power density is 20.27 kW/kg, the energy density reaches 11.26 Wh/kg. Finally, the button supercapacitors were assembled used the prepared nanocomposites as electrodes. The nanocomposites exhibit stable capacitance efficiency after 100 cycles of charging and discharging. The capacitance efficiency still exceeds 80% after 500 cycles of charging and discharge, indicating that the nanocomposite has excellent cycle stability.

Perspective Chapter: Graphene Based Nanocomposites for Supercapacitor Electrodes

“…By using a chemical reduction-high-temperature process, Zhang et al [39] created graphene/Fe3O 4 (GN/Fe 3 O 4 ) nanocomposites as the electrode of supercapacitors. The surface of graphene is routinely decorated with Fe 3 O 4 particles of equal size.…”

N-doped MXene derived from chitosan for the highly effective electrochemical properties as supercapacitor

“…• Modified MXene has excellent electrochemical performance. materials have become popular materials for applied electrodes [18][19][20][21]. As an emerging member of the 2D material family, transitional metal carbide or nitride, called MXene, shows remarkable performance in electrochemical energy storage [22].…”

Mesoporous Fe3O4@C nanoarrays as high-performance anode for rechargeable Ni/Fe battery

“…Iron owns multiple valence states and rich redox chemistry, enabling its high theoretical specific capacity within a wide potential range [19]. However, the multiphase transition of iron oxide can cause large volume expansion and pulverization of the active electrode film, resulting in a sharp decrease in capacity only within hundreds of cycles [20]. In order to reduce the loss of active materials during the electrochemical process, nanostructured electrodes were developed [21].…”