N-doped layered porous carbon electrodes with high mass loadings for high-performance supercapacitors
| Autor: | Zhenpeng Xiao, Lizhi Sheng, Lili Jiang, Yunyun Zhao, Zhuangjun Fan, Baoquan Hou |
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| Rok vydání: | 2021 |
| Předmět: |
Supercapacitor
Materials science Materials Science (miscellaneous) Doping chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Capacitance 0104 chemical sciences Chemical engineering chemistry Electrical resistivity and conductivity Electrode Specific energy Gravimetric analysis General Materials Science 0210 nano-technology Carbon |
| Zdroj: | Carbon. 177:429 |
| ISSN: | 0008-6223 |
| DOI: | 10.1016/j.carbon.2021.02.018 |
| Popis: | We report a porous carbon material (NPCM) with a high N content as a high-performance supercapacitor electrode material which was prepared by a simple activation-doping process using Metaplexis Japonica shell as the carbon precursor, ammonium chloride as the nitrogen source and zinc chloride as the activation agent. Its high electrical conductivity, large ion-accessible surface area and fast ion transport ability make it possible to achieve a high mass loading of NPCM per area of the electrode and a high energy and high power density supercapacitor. An electrode with a low NPCM mass loading of 1 mg cm−2 has a gravimetric specific capacitance of 457 F g−1 and an areal specific capacitance of 47.8 μF cm−2. At a much high NPCM loading of 17.7 mg cm−2 it has a high gravimetric capacitance of 161 F g−1. Furthermore, an assembled NPCM//NPCM symmetric supercapacitor with an optimal NPCM loading of 12.3 mg cm−2 delivered a high specific energy of 12.5 Wh kg−1 at an ultrahigh power of 80 kW kg−1 in 1 mol L−1 Na2SO4. The achievement of such high-energy and high-power densities using NPCM will open exciting opportunities for carbon-based supercapacitors in many different applications. |
| Databáze: | OpenAIRE |
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