Synthesis of NiCo2O4/mesoporous carbon composites for supercapacitor electrodes
| dc.contributor.author | Kibona, Talam Enock | |
| dc.date.accessioned | 2020-06-09T13:45:35Z | |
| dc.date.available | 2020-06-09T13:45:35Z | |
| dc.date.issued | 2020 | |
| dc.description.abstract | In this study, nickel cobaltite/mesoporous carbon composites are synthesized by reacting CoCl2, Ni (NO3)2 and nitric acid-treated biogas slurry mesoporous carbon using urea as hydrolyzing agent and hexadecyltrimethylammonium bromide (CTAB) as surfactant. The presence of Ni, Co, C and O peaks in the EDX results confirm that the composites are successfully synthesized. Interestingly at 350 °C, the composite surface morphology switched to cross-linked nanoflake structures interconnected with mesoporous carbon. The X-ray diffraction analysis of the NiCo2O4/mesoporous carbon composites reveals that the spinel structure of the NiCo2O4 is maintained in the composites. The nitrogen uptake increases with increasing annealing temperature to 300 °C then decreases at higher temperature (400 °C). The type IV isotherms are exhibited by all the composites. The contribution of mesopores increases with increasing annealing temperature: 32% for BC-NCo-200, 41% for BC-NCo-250, 56% for BC-NCo-300, 66% for BC-NCo-350 and 86% for BC-NCo-400. The NiCo2O4/mesoporous carbon composites exhibit high specific capacitance of 835 F g−1 at scan rate of 5 mV s−1 for sample annealed at 350 °C. The cyclic stabilities of the electrodes are above 90% after 50,000 cycles indicating that the synthesized composites are suitable candidates for supercapacitors. | en_US |
| dc.identifier.doi | https://doi.org/10.1007/s10008-020-04673-4 | |
| dc.identifier.uri | http://hdl.handle.net/20.500.11810/5460 | |
| dc.language.iso | en | en_US |
| dc.publisher | Springer | en_US |
| dc.title | Synthesis of NiCo2O4/mesoporous carbon composites for supercapacitor electrodes | en_US |
| dc.type | Journal Article, Peer Reviewed | en_US |