Synthesis of a ternary FeNi2S4/CNT/graphene nanocomposite with improved electrochemical properties

In this paper, a simple one-pot method is achieved for preparation of a FeNi2S4-CNT-graphene nanocomposite, which displays robust connection among ternary components. Compared with the counterparts without CNT, the FeNi2S4-CNT-graphene nanocomposite demonstrated significantly improved electrochemical properties. Especially, in addition to its high specific capacitance (725 F g(-1) at 10 A g(-1), 3.63 F cm(-2) at a current density of 50 mA cm(-2)), a cycling test employing FeNi2S4-CNT-graphene as the electrode material demonstrated a capacity retention of about 88% after 2500 charging-discharging cycles. The superior synergistic effect among the three components was demonstrated, making it a promising candidate for next-generation supercapacitors.