NiMoO4 nanowire @ MnO2 nanoflake core/shell hybrid structure aligned on carbon cloth for high-performance supercapacitors

Abstract

A novel hybrid structure of core/shell NiMoO₄@MnO₂ was directly synthesized on carbon cloth by a facile two-step hydrothermal route for supercapacitors. The smart combination of NiMoO₄ and MnO₂ shows a synergistic effect for capacitors with greatly enhanced performance. The NiMoO₄@MnO₂ electrode yields high-capacitance performance with a high areal capacitance of 3.90 F cm⁻² at a charge and discharge current density of 8 mA cm⁻² and 3.22 F cm⁻² at 24 mA cm⁻² with a desirable cycling ability (90.5% of the initial specific capacitance remains after 4000 cycles). Such core/shell hybrid nanoarchitectures exhibit remarkable electrochemical performance with high capacitance and excellent long-term cycling stability, which could be promising pseudocapacitive electrode materials for high-performance supercapacitors.