Superior electrochemical activity of α-Fe2O3/rGO nanocomposite for advance energy storage devices

Abstract A nanocomposite containing α-Fe 2 O 3 nanoparticles entangled with reduced graphene oxide nanosheets have been synthesized via simple hydrothermal and ultra-sonication method. It is observed that graphene nanosheets enhanced the electrical conductivity and electrochemical activity of α-Fe 2 O 3 nanoparticles. The superior electrical conductivity of α- Fe 2 O 3 /rGO nanocomposite was confirmed by two probe current-voltage ( I-V ) measurements. The enhanced electrochemical activity of α- Fe 2 O 3 /rGO nanocomposite was confirmed by electrochemical impedance spectroscopy measurements and cyclic voltammetry experiments. It is observed that as-prepared α- Fe 2 O 3 /rGO nanocomposite has superior charge-transfer resistance and higher specific capacitance than bare α-Fe 2 O 3 nanoparticles. Moreover, nanocomposite retained 75% of the initial capacitance after 1000 cycles. Due to tremendous electrochemical performance, the α- Fe 2 O 3 /rGO nanocomposite have potential applications in energy storage devices.