Conversion of soybean waste to sub-micron porous-hollow carbon spheres for supercapacitor via a reagent and template-free route
| Autor: | Wei Sun, Fuqian Yang, Shanshan Wang, Dong-Sheng Yang |
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| Rok vydání: | 2019 |
| Předmět: |
Supercapacitor
Inert Materials science Renewable Energy Sustainability and the Environment Materials Science (miscellaneous) Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Amorphous solid Hydrothermal carbonization Fuel Technology Nuclear Energy and Engineering Chemical engineering chemistry Reagent SPHERES 0210 nano-technology Porosity Carbon |
| Zdroj: | Materials Today Energy. 13:50-55 |
| ISSN: | 2468-6069 |
| Popis: | Sub-micron porous-hollow carbon spheres are synthesized from ground soybean waste via a facile and economical hydrothermal carbonization and high-temperature heat-treatment in different media. The sub-micron porous-hollow carbon spheres after the heat treatment with the flow of argon have an average size of 398 ± 10 nm and an average shell thickness of ∼40 nm. The carbon in the porous-hollow spheres is amorphous. The electrochemical analyses of the porous-hollow spheres reveal that the porous-hollow carbon spheres heat-treated with the flow of the mixture of N2 and H2O steam have good capacitive properties and high specific capacitances, and the porous-hollow carbon spheres heat-treated in an inert medium (N2 or Ar) possess relatively low capacitances with good rate capability. The results reported in this work likely provide a new and simple route for preparing functional materials with designed structures. |
| Databáze: | OpenAIRE |
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