Enhancement of Supercapacitor Performance of Electrochemically Grown Nickel Oxide by Graphene Oxide

beta-Ni(OH)(2) and beta-Ni(OH)(2)/graphene oxide (GO) were prepared on an Ni foil electrode using the electrochemical cyclic voltammetry formed in 0.5 M KOH solution. Several surface analyses such as XPS, XRD, and Raman spectroscopies were used to confirm the chemical structure of the prepared materials. The morphologies were determined using SEM and AFM. The addition of the graphene oxide layer showed a remarkable increase in the specific capacitance of the hybrid. Through the measurements, the specific capacitance values were 280 F g(-1) and 110 F g(-1) after and before adding 4 layers of GO, respectively. The supercapacitor displays high stability until 500 cycles are charged and discharged almost without a loss in its capacitance values.

Automated summary

Beta-Ni(OH)(2) and beta-Ni(OH)(2)/graphene oxide (GO) were prepared on an Ni foil electrode using the electrochemical cyclic voltammetry in 0.5 M KOH solution. Surface analyses such as XPS, XRD, and Raman spectroscopies confirmed the chemical structure and SEM and AFM determined the morphologies. The addition of GO layer significantly increased the specific capacitance of the hybrid. The supercapacitor exhibited high stability even after 500 cycles without reduction in capacitance values.