Nitrogen-doped holey graphene nanoscrolls for high-energy and high-power supercapacitors

被引:26
作者
Su, Feng [1 ,2 ]
Zheng, Shuanghao [1 ]
Liu, Fangyan [1 ]
Zhang, Xiong [3 ,5 ]
Su, Fangyuan [4 ,5 ]
Wu, Zhong-Shuai [1 ]
机构
[1] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Inst Elect Engn, Beijing 100190, Peoples R China
[4] Chinese Acad Sci, Inst Coal Chem, CAS Key Lab Carbon Mat, Taiyuan 030001, Peoples R China
[5] Chinese Acad Sci, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
基金
中国国家自然科学基金; 国家重点研发计划;
关键词
Graphene nanoscrolls; Nitrogen doping; Holey grapheme; Supercapacitors; Ionic liquid; HIGH-PERFORMANCE; OXIDE; FABRICATION; ELECTRODE; SULFUR;
D O I
10.1016/j.cclet.2020.07.025
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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.
引用
收藏
页码:914 / 917
页数:4
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