Synthesis of NiO@MnO2 core/shell nanocomposites for supercapacitor application.

In this work, NiO@MnO 2 core/shell nanocomposites were fabricated by a two-step method. The morphology and structure of the nanocomposites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction analysis and thermal gravity analysis. In addition, the supercapacitive performances were examined by cyclic voltammogram (CV), galvanostatic charge–discharge and electrochemical impedance spectroscopy (EIS). The electrochemical results indicate that the composite exhibits a specific capacitance of 266.7 F g −1 at 0.5 A g −1 and excellent cycling stability (81.7% retention after 2000 cycles at 1 A g −1 ). Therefore, this wok offers meaningful reference for supercpacitor applications in the future. [ABSTRACT FROM AUTHOR]