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The estimated specific capacitance (Cs), energy density (Ed) and power density (p) of MnO2 and MnO2/NiO electrodes at constant current density 1.25 A/g in 0.5 M Na2SO4 electrolytes solution.
| Samples | Specific capacitance (F/g) | Energy density (Wh/kg) | Power density (W/kg) |
|---|---|---|---|
| MnO2 | 106 | 2.35 | 248 |
| MnO2/NiO (1%) | 159 | 3.53 | 249 |
| MnO2/NiO (3%) | 253 | 5.6 | 248 |
| MnO2/NiO (5%) | 259 | 5.75 | 249 |
| MnO2/NiO (7%) | 343 | 7.62 | 249 |
