Table 3 Benchmarking the electrochemical capacitance and stability of f-Ni(OH)₂ electrodes for supercapacitor applications.
Material/System | Modification/Irradiation | Electrolyte | Specific Capacitance | Current Density | Capacitance Retention (%) | Cycle Count | Reference |
|---|---|---|---|---|---|---|---|
Ni(OH)₂ | None | 1.0 M Na₂SO₄ | 474.7 mF·cm−2 (CV) / 1002.5 mF·cm−2 (GCD) | 1.0 mV·s−1/1.0 mA·cm−2 | 96.3% | 5000 cycles | This study |
f-Ni(OH)₂ | X-ray (15 MV, 10–20 Gy) | 1.0 M Na₂SO₄ | 671.2 mF·cm−2 (CV) / 1253.5 mF·cm−2 (GCD) | 1.0 mV·s−1/1.0 mA·cm−2 | 99.2% | 5000 cycles | This study |
Ni(OH)₂/MWCNT/CNF Composite | Carbon nanotube/carbon nanofiber hybrid | 2.0 M KOH | ~ 800 F·g−1 | 1.0 A·g−1 | 92% | 5000 cycles | Asaithambi et al., 2023 |
Ni(OH)₂/Ni Foam | Direct growth on Ni foam | 1.0 M KOH | ~ 1680 F·g−1 | 1.0 A·g−1 | 85% | 4000 cycles | Dai et al., 201527 |
Ni(OH)₂@ZIF-67 (Co–C–N nanosheets) | MOF-derived composite | 6.0 M KOH | ~ 1950 F·g−1 | 1.0 A·g−1 | 94.8% | 5000 cycles | Li et al., 202232 |
Ni(OH)₂ 1D/2D Hybrid on Biocarbon | Biomass-derived carbon + nanosheets | 2.0 M KOH | ~ 1200 F·g−1 | 1.0 A·g−1 | 90% | 3000 cycles | Gao et al., 202330 |
