期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 7, 期 26, 页码 15707-15713出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta02165e
关键词
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资金
- National Natural Science Foundation of China [21676070]
- Hebei Training Program for Talent Project [A201500117]
- Beijing National Laboratory for Molecular Sciences
- Hebei One Hundred-Excellent Innovative Talent Program (III) [SLRC2017034]
Carbon composite materials with diverse structures show enhanced electrochemical performance as electrodes in energy storage devices than single component structures. Herein, rich mesoporous carbon nanosheets embedded with vesicle structures (CS-v) were prepared by a simple synergetic assembly strategy using 1-octadecyl-3-methylimidazolium bromide ([C(18)Mim]Br) as the surfactant, phenolic resin as the carbon precursor, silica precursor as an additive and iron(iii) nitrate as the catalytic active center. [C(18)Mim]Br played an important role in the formation of flake morphology and nitrogen doping. The silica created a rich mesoporous structure on the CS-v, which improved the surface area. The addition of iron(iii) nitrate not only creates vesicle structures but also leads to thinner sheets for CS-v, which accelerates the transfer and storage of charge, and improves the electrochemical performance. When used as the electrode in a supercapacitor, CS-v showed a high specific capacity of 341 F g(-1) at the current density of 1 A g(-1) in a three-electrode system, which is more than ca. 2.5 times enhancement compared with that of pure mesoporous carbon nanosheets, and an excellent long cycling ability with 99.5% of the initial capacity was retained after 10 000 cyclic tests, demonstrating its potential in energy storage devices.
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