Synthesis of Biomass-Derived Nitrogen-Doped Porous Carbon Nanosheests for High-Performance Supercapacitors
| Autor: | Lei Pan, Tingyue Peng, Zhongxue Yang, Mingbo Wu, Cai Gao, Han Hu, Weinan Zhao, Lu Guan |
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| Rok vydání: | 2019 |
| Předmět: |
Supercapacitor
Materials science Nanostructure Renewable Energy Sustainability and the Environment General Chemical Engineering chemistry.chemical_element Biomass 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Capacitance 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering medicine Environmental Chemistry 0210 nano-technology Porosity Melamine Carbon Activated carbon medicine.drug |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 7:8405-8412 |
| ISSN: | 2168-0485 |
| Popis: | Graphene-like two-dimensional carbon nanosheets with properly modulated compositions and porosity are of particular importance for robust capacitance harvesting. Nevertheless, the large-scale and cost-effective production of such nanostructures still remains a great challenge. Herein, we innovatively produce nitrogen-doped porous carbon nanosheets using pine nut shells, an abundant biomass waste, as the precursor, under the synergetic effect of KOH and melamine during the activation process. The sole activation of the precursors with KOH can produce only traditional activated carbon particles of several micrometers, while interestingly, the extra introduction of melamine results in nitrogen-doped porous carbon nanosheets possessing high tunability. By construction of a two-electrode configuration, the supercapacitors with optimal nanosheets as the electrode materials can deliver a superior specific capacitance of 324 F g –1 at 0.05 A g–1, outstanding rate capability of 258 F g–1 at 20 A g–1, and extraordi... |
| Databáze: | OpenAIRE |
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