Graphite Oxide/β-Ni(OH)_2 Composites for Application in Supercapacitors

摘要

Graphite oxide/β-Ni(OH)_2 composites have been investigated as electrode material in supercapacitors. Phase formation of electrode material is investigated using diffraction measurements. Particle shape-size studies show deposition of β-Ni(OH)_2 nanoparticles on graphite oxide (GO) sheets. Electrochemical performance of GO/β-Ni(OH)_2 composite in supercapacitors is discussed based on the analysis of electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and galvanostatic charge-discharge studies. Excellent energy density of ~53Wh/kg in 1M Na_2SO_4 aqueous electrolyte is reported at power density of ~1364W/kg. The significance of results is discussed in the paper.