Direct growth of Fe3O4-MoO2 hybrid nanofilm anode with enhanced electrochemical performance in neutr

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To enhance the electrochemical energy storage performance of supercapacitors (SCs), the current re-searches are general directed towards the cathode materials. However, the anode materials are relatively less studied. In the present work, Fe3O4-MoO2 (FO-MO) hybrid nano thin film directly grown on Ti substrate is investigated, which is used as high-performance anode material for SCs in Li2SO4 electrolyte with the comparison to pristine Fe3O4 nanorod array. The areal capacitance of FO-MO hybrid electrode was initially found to be 65.0 mF cm?2 at 2 mV s?1 and continuously increased to 260.0%after 50 cycles of activation. The capacitance values were considerably comparable or higher than many reported thin-film iron oxide-based anodes in neutral electrolyte. With the protection of MoO2 shell, the FO-MO electrode developed in this study also exhibited excellent cyclic stability (increased to 230.8%after 1000 cycles). This work presents a promising way to improve the electrochemical performance of iron oxide-based anodes for SCs.
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