The Graphene/Fe3O4 Nanocomposites as Electrode Materials of Supercapacitors
| Autor: | Liuyue Pu, Yueting Jiao, Shi-Yun Li, Jijun Tang, Jiaoxia Zhang, Yamei Zhang, Gao Yifeng |
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| Rok vydání: | 2020 |
| Předmět: |
Supercapacitor
Electrode material Materials science Nanocomposite Graphene Biomedical Engineering Bioengineering 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Capacitance law.invention Chemical engineering law Electrode General Materials Science 0210 nano-technology Current density Power density |
| Zdroj: | Journal of Nanoscience and Nanotechnology. 20:3164-3173 |
| ISSN: | 1533-4880 |
| DOI: | 10.1166/jnn.2020.17391 |
| Popis: | The graphene/Fe3O4 (GN/Fe3O4) nanocomposites used as electrode of supercapacitors were prepared by chemical reduction-high temperature treatment. The Fe3O4 with uniform size regularly decorate on the surface of graphene. According to the charge and discharge test, the GN/Fe3O4-0.05 electrode has the good mass specific capacitance (265.6 F/g) at a current density of 0.5 A/g. When the power density is 20.27 kW/kg, the energy density reaches 11.26 Wh/kg. Finally, the button supercapacitors were assembled used the prepared nanocomposites as electrodes. The nanocomposites exhibit stable capacitance efficiency after 100 cycles of charging and discharging. The capacitance efficiency still exceeds 80% after 500 cycles of charging and discharge, indicating that the nanocomposite has excellent cycle stability. |
| Databáze: | OpenAIRE |
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