Table 3. Comparison of the produced Cs with those reported in literature for phosphate-based electrodes.
| Material | Electrolyte | Specific capacitance (current density) | Ref. |
|---|---|---|---|
| Nickel–zinc phosphate microspheres with carbon dots | 3.0 M KOH | 1885.7 F g−1 (1 A g−1) | 120 |
| Ni3(PO4)2/RGO/Co3(PO4)2 | 1 M KOH | 1137.5 F g−1 (0.5 A g−1) | 121 |
| Porous Ni2P/Co2(P2O7) | 3 M KOH | 1720 F g−1 (1.0 A g−1) | 122 |
| Ni3(PO4) in Ag3PO4 | 1 M KOH | 539 F g−1 (1 A g−1) | 123 |
| Cobalt pyrophosphate | 3.0 M KOH | 367.2 F g−1 (0.625 A g−1) | 124 |
| Tungsten-doped cadmium zinc phosphate nanoporous | 5 mM potassium ferro/ferricyanide +0.1 M KCl | 2257 F g−1 (1 A g−1) | This work |