Three-dimensional hierarchical CC@ZnO@MnO2 as electrodes for supercapacitors with high electrochemical performance

In this work, we fabricated the three-dimensional hierarchical structure ZnO@MnO2 hybrid material on highly conductive flexible carbon cloth (CC) via hydrothermal method and thermal decomposition method for high-performance supercapacitors. During the electrochemical analysis, the hybrid CC@ZnO@MnO2 nanostructures exhibited a high area specific capacitance of 351.5 mF cm(- 2) and a specific capacitance of 585.8 F g(- 1) at a current density of 1.0 mA cm(- 2), which was more than three times higher than that of initial CC@MnO2 electrode material. In addition, the area specific capacitance of the assembled symmetric button-type supercapacitor was 48.57mF cm(- 2) and the capacitance retention rate of 100 % was obtained after 10,000 charge-discharge cycles with a current density of 1 A g(- 1). Therefore, these results indicate that CC@ZnO@MnO2 is a highly attractive candidate material for future developments of supercapacitors.

Automated summary

The study synthesized ZnO@MnO2 hybrid material on flexible carbon cloth through hydrothermal method and thermal decomposition method for high-performance supercapacitors. The hybrid nanostructures demonstrated high specific capacitance and capacitance retention rate, indicating their potential for future supercapacitor developments.