A two-step method for the preparation of high performance corncob-based activated carbons as supercapacitor electrodes using ammonium chloride as a pore forming additive
| Autor: | Xiaomin Yang, Xiao-Feng Wang, Zichen Wang, Qingling Wei, Zhimin Chen |
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| Rok vydání: | 2019 |
| Předmět: |
Supercapacitor
Materials science Materials Science (miscellaneous) 02 engineering and technology General Chemistry Corncob 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Capacitance 0104 chemical sciences chemistry.chemical_compound Chemical engineering chemistry Yield (chemistry) Electrode medicine Ammonium chloride General Materials Science 0210 nano-technology Activated carbon medicine.drug |
| Zdroj: | Carbon. 144:841 |
| ISSN: | 0008-6223 |
| DOI: | 10.1016/j.carbon.2018.11.089 |
| Popis: | Activated carbons were prepared from corncobs by an initial hydrothermal treatment using ammonium chloride as a pore forming additive and then by KOH activation. Samples were characterized by SEM, XRD, TG analysis and nitrogen adsorption. The effects of preparation conditions on the iodine number, yield and their electrochemical performance as supercapacitor electrodes were investigated. Results indicate that NH4Cl is helpful for the formation of activated carbons with a hierarchical pore structure. The best activated carbon prepared has a good rate performance with a capacitance of 175 F·g−1 at 0.5 A·g−1 and a capacitance retention ratio of 73.0% at 20 A·g−1, and a good cycling stability with a specific capacitance change from 175 to 173 F·g−1 after a 10 000 charge/discharge test. |
| Databáze: | OpenAIRE |
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