h-BN doped β-MnO2 nanobelts composite as superior electrode materials for supercapacitors

The electrochemical performance of MnO2 electrode material is limited by its poor electrical conductivity and cationic-protonic diffusion. In this work, we introduce the preparation of a novel h-BN/beta-MnO2 nanocomposite as superior electrode materials for extremely promising supercapacitors. The phase, surface morphologies and the internal atomic structures of the nanocomposite were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscope (TEM). The electrochemical performance including cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS) was conducted under three-electrode system. The h-BN doped beta-MnO2 nanobelts composite electrode displayed a specific capacitance of 578.4F g(-1) at a current density of 0.5 mA cm(-2) (similar to 0.36 A g(-1)) and retained nearly 97.1 % capacitance even after 5000 cycles.

Automated summary

In this study, a novel h-BN/beta-MnO2 nanocomposite was prepared and demonstrated to be a superior electrode material for supercapacitors, with high specific capacitance and excellent cycling stability. The electrochemical performance of the nanocomposite was analyzed using various techniques such as XRD, SEM, TEM, CV, GCD, and EIS, showing promising results for energy storage applications.