期刊
ELECTROCHIMICA ACTA
卷 204, 期 -, 页码 100-107出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.04.063
关键词
graphene sheets; nitrogen doping; electrochemical exfoliation; supercapacitor; energy storage
资金
- Guizhou Provincial Department of Education 125 Major Project Fundation [QJH2013(027)]
- Research Fund for the Doctoral Program of Tongren University [trxyDH1513]
- State Key Laboratory of Electronic Thin Films and Integrated Devices of UESTC [KFJJ201411]
- Fundamental Research Funds for the Central Universities of University of Electronic Science and Technology of China [A03010023801115, ZYGX2014J087]
- Science and Technology Department in Sichuan province [M110238012014GZ0151]
Electrochemically anodic exfoliation of graphite has been developed for nitrogen-doped few -layer graphene sheets (N-FLGS), demonstrating high N-doping levels of 6.05 atom%. The process for the preparation of N-FLGS is involved with the intercalation of glycine anions H2NCH2COO into the graphite layers, electro-polymerization of large electro-oxidation products H2NCH2CONHCH2, and in situ N -doping in the graphite layer. Transmission electron microscopy, X-ray photoelectron spectroscopy, Xray diffraction, and Raman spectroscopy were employed to characterize the structure and properties of the N-FLGS. The as -fabricated N-FLGS utilized as electrode materials for supercapacitor exhibit enhanced electrochemical performance, including excellent cycling stability (the capacitance ratios after 10 000 cycles is 96.1%) and a remarkable rate capability (184.5 Fg (1) at 1 A g (1), 132.7 Fg (1) at 50 A g (1)). (C) 2016 Elsevier Ltd. All rights reserved.
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