Table 1.
Comparison of the supercapacitor values of various nanostructured of cobalt oxides (Co3O4), Manganese oxides (MnO2) and Co3O4@MnO2/NGO electrodes reported in the literature.
| Electrode material | Preparation method | Capacitance (F g−1) | Cyclic stability | Ref |
|---|---|---|---|---|
| Porous Cobalt oxide nanocomposite | Hydrothermal process | 226.3 F g−1 at 10 mVs−1 | 24% loss after 5000 cycles | 46 |
| rGO/Cobalt oxide | Hydrothermal process | 278.5 F g−1 at 200 m A g−1 | 9.4% loss after 2000 cycles | 47 |
| Cauliflower like Co3O4 | Hydrothermal process | 863 F g-1 at 1 mVs−1 | No decay after 1000 cycles | 48 |
| Co3O4 decorated graphene | One –spot Solvothermal process | 346 Fg−1 at 1 A g−1 | 15% loss after 50 cycles | 49 |
| Co3O4@graphene | Hydrothermal synthesis | 415 Fg−1 at 3 A g−1 | 26% loss after 300 cycles | 50 |
| MnO2/RGO composite | Electrochemical deposition | 125.93 Fg−1 at 10 mV s−1 | 20% loss after 5000 cycles | 51 |
| MnO2 on graphene | Hydrothermal | 280 Fg−1 at 1 A g−1 | 9% loss after 10,000 cycles | 52 |
| Co3O4 nanotubes | Chemical deposition | 273 Fg−1 at 0.5 A g−1 | 22% loss after 500 cycles | 53 |
| Cobalt tungstate (CoWO4) | Chemical precipitation reaction | 1127.6 Fg−1 at 1 A g−1 | 24.3% loss after 3,000 cycles | 54 |
| Co3O4@MnO2 core shell nanostructure | hydrothermal approach | 560 F g−1 at a current density of 0.2 A g−1 | 5% loss after 5000cycles | 55 |
| Co3O4@pt@MnO2 | Nanowire arrays on the Ti substrate coating | 497 F g−1 at 10 mV/s | No loss after 5000 cycles | 57 |
| Co 3 O 4 @MnO 2 /NGO | Thermal reduction process | 347 F g − 1 at 0.5 A g − 1 | 31% loss after 10,000 cycles | This work |