期刊
ADVANCED FUNCTIONAL MATERIALS
卷 29, 期 40, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201904785
关键词
carbon capture; nitrogen-doped carbon aerogels; porous carbons; supercapacitors
类别
资金
- Fundamental Research Funds for the Central Universities [2232019A3-01]
- National Natural Science Foundation of China [51873036, 51673039]
- Natural Science Foundation of Shanghai [19ZR1470900]
- Shanghai Shuguang Program [19SG28]
- Sino-German Center for Research Promotion [GZ1286]
- International Joint Laboratory for Advanced fiber and Low-Dimension Materials [18520750400]
Nitrogen-doped carbon aerogels (NCAs) have received great attention for a wide range of applications, from thermal electronics to waste water purification, heavy metal or gas adsorption, energy storage, and catalyst supports. Herein NCAs are developed via the synthesis of a Schiff-base porous organic polymer aerogel followed by pyrolysis. By controlling the pyrolysis temperature, the polymer aerogel can be simply converted into porous NCAs with a low bulk density (5 mg cm(-3)), high surface area (2356 m(2) g(-1)), and high bulk porosity (70%). The NCAs containing 1.8-5.3 wt% N atoms exhibit remarkable CO2 uptake capacities (6.1 mmol g(-1) at 273 K and 1 bar, 33.1 mmol g(-1) at 323 K and 30 bar) and high ideal adsorption solution theory selectivity (47.8) at ambient pressure. Supercapacitors fabricated with NCAs display high specific capacitance (300 F g(-1) at 0.5 A g(-1)), fast rate (charge to 221 F g(-1) within only 17 s), and high stability (retained >98% capacity after 5000 cycles). Asymmetric supercapacitors assembled with NCAs also show high energy density and power density with maximal values of 30.5 Wh kg(-1) and 7088 W kg(-1), respectively. The outstanding CO2 uptake and energy storage abilities are attributed to the ultra-high surface area, N-doping, conductivity, and rigidity of NCA frameworks.
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