Supercapacitive performance of rgo/ni codoped zno nanocomposite / Nur Syahirah Ahmad Tamizi

In this work, the supercapacitive performance of carbon-metal-metal oxides
nanocomposites were observed with various addition of metal oxides
nanocomposites. The supercapacitive behaviour of rGO/Ni/ZnO with different
weight of ZnO were studied at various scan rate of 20 mV/s to 100 mV/s using
the electrochemical properties test, Cyclic Voltammetry (CV) in 1 M sulphuric
acid (H2S04) was used as an electrolyte. There are four parameters have been
determined the supercapacitive behaviour which are specific capacitance, energy
density, power density and discharging time. Based on this electrochemical
findings, the incorporation of 10% ZnO boost the specific capacitance (Cs) from
96.46 F/g of pure rGO to 131.24 F/g at 20 mV/S. Also, it did the same towards
energy density, from 48.23 Wh/kg to 65.62 Wh/kg and power density from 1.073
kW/kg to 1.328 kW/kg. The effect of ZnO addition were further analysed by
charge discharge test where the tribrid nanocomposite with 10% weight of ZnO
shows the highest discharging time, 449.423 s compared to other ZnO weight
addition and pure rGO. The results obtained were further compared with previous
studies where its shows a comparable results and better performance in all four
parameters