Table 2.
The best special capacitances of each material.
| Materials | Synthetic Method | Specific Capacitance (F·g−1) |
|---|---|---|
| RuO2 | Sol-gel method | 720 [18] |
| MnO2 | Template method | 297 [39] |
| NiO | Gydrothermal method | 1700 [46] |
| Co3O4 | Sol-gel method followed by freeze-drying | 742.3 [60] |
| Co3O4/Ni | Robust adhesion | 2735–1471 [64] |
| NiCo2O4 | Sydrothermal method assisted by PVP and a post annealing treatment | 1619.1 [72] |
| NiCo2O4/Ni | Hydrothermal method followed by annealing process | 2623.3 [77] |
| RuO2/Order mesoporous carbon | Soak followed by annealing | 633 [4] |
| MnO2/Mesopous silica supported carbon nanomembranes | In situ grown | 964 [79] |
| NiO/Mesopous silica supported carbon nanomembranes | In situ grown | 620 [79] |
| Co3O4/MWCNT | Chemical co-precipitation method | 418 [80] |