Facile and cost-effective synthesis of flower-like RGO/Fe3O4 nanocomposites with ultra-long cycling stability for supercapacitors

The RGO/Fe3O4 nanocomposites were synthesized by an easy and cost-effective graphenothermal process during which GO and Fe2O3 were reduced to RGO and Fe3O4, thus forming the RGO/Fe3O4 nanocomposite. This material possesses high specific surface area of 141.3 m2 g−1 and average pore diameter of 5.8 nm. The RGO/Fe3O4 nanocomposites showed excellent electrochemical performance in supercapacitors (SCs). As a SC electrode, it exhibited an excellent specific capacitance (Cs) of 498 F g−1 at a scan rate of 10 mV s−1 and maintained 98.7% of capacitance retention at 500 mV s−1 over 5000 cycles. Moreover, it exhibited 94% of capacitance retention over 10,000 cycles at a current density of 3 A g−1. So, the developed RGO/Fe3O4 nanocomposite materials here hold high potential for energy storage applications.