The precipitant influence on the electrochemical performance of NiCoO2 nanostructure

Different precipitants are employed to fabricate NiCoO2 with various morphologies. X-ray powder diffraction characterization demonstrates that the NiCoO2 products obtained using different precipitants display the same crystallization. The electrochemical performance display that the specific capacitance of the NiCoO2 nanostructure obtained using urea is up to 328.5 F g−1 at a current density of 0.62 A g−1 in 2 M KOH aqueous electrolyte. The obvious redox peaks on the cyclic voltammetry curves show that the NiCoO2 displays pseudocapacitor performance. The cycling stability reveals that the specific capacitance retains 95.2% after 1500 cycles at different current densities, indicating superior rate capability of the NiCoO2-urea electrode. These results indicate a promising potential application of NiCoO2 for using as an effective electrode material in supercapacitors.