Synthesis and characterization of nanoflakes β-Ni(OH)2 microspheres for supercapacitors

摘要

Nanoflakes β-Ni(OH)2 microspheres were successfully synthesized by a facile hydrothermal.The microstructures and morphology were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM).Electrochemical properties studies were carried out using cyclic voltammetry (CV),galvanostaitc charge/discharge and electrochemical impedance spectroscopy methods,respectively.The results exhibited that the β-Ni(OH)2 single electrode had high specific capacitance in KOH electrolyte.A maximum specific capacitance of 1929 F/g could be achieved in 6 M aqueous KOH with 0 to 0.4 V potential at a charge-discharge current density of 6 mA/cm2.Therefore,the obtained nanoflakes β-Ni(OH)2 microspheres can be a potential application electrode material for supercapacitors.