Dimethylsulfoxide-Dependent Environments for Fabricating Graphene Hydrogels for High-Performance Supercapacitor
| Autor: | Ling-Bao Xing, Zhao Yuan, Fengzhi Dong, Zhe Lian, Fei Qiao, Fushun Yu, Man Jiang |
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| Rok vydání: | 2019 |
| Předmět: |
Supercapacitor
Materials science Graphene Biomedical Engineering Oxide Bioengineering 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics law.invention symbols.namesake chemistry.chemical_compound Chemical engineering X-ray photoelectron spectroscopy chemistry Transmission electron microscopy law symbols General Materials Science Fourier transform infrared spectroscopy 0210 nano-technology Raman spectroscopy High-resolution transmission electron microscopy |
| Zdroj: | Journal of nanoscience and nanotechnology. 19(9) |
| ISSN: | 1533-4880 |
| Popis: | In present work, reduced graphene oxide hydrogels (DRGHs) with three-dimensional (3D) porous structures are prepared through chemical reduction method by using dimethylsulfoxide (DMSO) as reductants in alkaline environment of ammonia. The reduction of graphene oxide (GO) into DRGHs was confirmed by X-ray powder diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FT-IR). The field emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HRTEM) of DRGHs exhibited 3D structures with well-defined porous networks crosslinking of graphene sheets, which is beneficial to be promising electrode materials for supercapacitors. Moreover, the obtained DRGHs exhibited different electrochemical performance in supercapacitors with adding different amounts of DMSO. With increasing the dosage of the reductants, the DRGHs revealed better specific capacitances. DRGHs showed excellent capacitive performance with a very high specific capacitance up to 313.6, 323.6 and 348.0 F g-1 for DRGHs-1, DRGHs-2 and DRGHs-3 at 0.2 A g-1, respectively. It also showed that the electrode based on DRGHs has good stability and high reversibility in the charge/discharge cycling test. |
| Databáze: | OpenAIRE |
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