Effect of various aqueous electrolytes on the electrochemical performance of porous NiO nanocrystals as electrode material for supercapacitor applications

The electrochemical performance of porous Nickel oxide nanocrystals synthesised by the hydrothermal method is discussed here. In this porous Nickel oxide, crystal structure and morphology were investigated by XRD, FTRaman, FE-SEM and HR-TEM. The electrochemical performance of porous Nickel oxide electrode examined by various aqueous electrolytes such as 1 M Na2SO4, 0.5 M KOH and 1 M Na2SO4 + 0.5 M KOH solution. The electrode material delivers high specific capacitance found as 200 F/g at 1 A/g using a single aqueous electrolyte 1 M Na2SO4. The porous Nickel oxide nanocrystals electrode performed the long-term good cyclic stability around 2000 cycles with 91% capacity retention. Here, 1 M Na2SO4 electrolyte achieves high capacity among various electrolytes can be considered as promising electrode material for supercapacitor applications.