期刊
CHINESE CHEMICAL LETTERS
卷 32, 期 2, 页码 914-917出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2020.07.025
关键词
Graphene nanoscrolls; Nitrogen doping; Holey grapheme; Supercapacitors; Ionic liquid
资金
- National Natural Science Foundation of China [51872283, 21805273]
- National Key R&D Program of China [2016YBF0100100, 2016YFA0200200]
- Liaoning BaiQianWan Talents Program, LiaoNing Revitalization Talents Program [XLYC1807153]
- Natural Science Foundation of Liaoning Province, Joint Research Fund Liaoning-Shenyang National Laboratory for Materials Science [20180510038]
- DICP [DICP ZZBS201708, DICP ZZBS201802]
- DICPQIBEBT [DICPQIBEBT UN201702]
- DNL Cooperation Fund, CAS [DNL180310, DNL180308, DNL201912, DNL201915]
NHGNSs are prepared through a simple method, exhibiting high specific capacitance and excellent rate capability, showing great potential for supercapacitor application.
Porous structure and heteroatom doping are two key parameters for significantly boosting the capacitive performance of graphene-based materials. Herein, we report a facile approach to prepare one-dimensional (1D) nitrogen-doped holey graphene nanoscrolls (NHGNSs) through cold quenching treatment of two-dimensional graphene oxide sheets, followed by thermal annealing in the successive atmosphere of NH3 and air. Benefiting from the synergy of the unique 1D tubular morphology, abundant nanoholes and nitrogen doping, the NHGNSs exhibit a high specific capacitance of 126 F/g at 1 A/g in ionic liquid electrolyte and excellent rate capability with 81% of the capacitance retained at 20 A/g. Furthermore, the fabricated symmetric supercapacitors based on NHGNSs achieve both high energy density of 53.5 Wh/kg at 875 W/kg and high power density of 17.5 kW/kg at 43.4 Wh/kg. The simple synthetic process and superior electrochemical performance suggest the great potential of NHGNSs for supercapacitor application. (C) 2020 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
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