A flexible supercapacitor based on bamboo shoot-like NiCo2Se4 hollow nanostructure

The electrochemical performance of the electrode material for supercapacitor is influenced by several factors and could be facilitated by a particular morphology. A reasonable morphology can provide more active sites and larger specific surface area, and increase the ion transport rate. Herein, NiCo2Se4 with hollow nanobamboo shoot (NBS) structure is prepared by a two-step hydrothermal process and the formation of hollow structure is due to the Kirkendall effect. The NiCo2Se4 synthesized with optimal conditions achieves a high specific capacitance of 6.21 F cm(-2) at a current density of 1 mA cm(-2), and the cycling stability of NiCo2Se4 is as high as 76% after 5000 cycles at 20 mA cm(-2). The designed NiCo2Se4//AC supercapacitor can achieve an energy density of 24.9 Wh kg(-1) at a power density of 537.04 W kg(-1). All of the above demonstrate that NiCo2Se4 bamboo shoot-like structure has a promising application in supercapacitor.

Automated summary

The electrochemical performance of the electrode material for supercapacitor can be improved by a specific morphology. NiCo2Se4 with a hollow nanobamboo shoot structure is prepared and it exhibits high specific capacitance and cycling stability. The designed NiCo2Se4//AC supercapacitor shows a high energy density at a certain power density.