Controllable synthesis of graphene sheets with different numbers of layers and effect of the number of graphene layers on the specific capacity of anode material in lithium-ion batteries

Journal Article · Sun May 15 00:00:00 EDT 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.03.004· OSTI ID:21494294

Tong, Xin ^[1]; Wang, Hui ^[1]; Wang, Gang ^[1]; Wan, Lijuan; Ren, Zhaoyu; Bai, Jintao ^[2]; Bai, Jinbo ^[3]

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1. Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), College of Chemistry and Materials Science, Northwest University, Xi'an 710069 (China)
2. National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base), National Photoelectric Technology and Functional Materials and Application International Cooperation Base, Institute of Photonics and Photon-Technology, Northwest University, Xi'an 710069 (China)
3. Lab. MSS/MAT, CNRS UMR 8579, Ecole Centrale Paris, 92295 Chatenay Malabry (France)

High quality graphene sheets are synthesized through efficient oxidation process followed by rapid thermal expansion and reduction by H{sub 2}. The number of graphene layers is controlled by tuning the oxidation degree of GOs. The higher the oxidation degree of GOs is getting, the fewer the numbers of graphene layers can be obtained. The material is characterized by elemental analysis, thermo-gravimetric analysis, scanning electron microscopy, atomic force microscopy, transmission electron microscopy and Fourier transform infrared spectroscopies. The obtained graphene sheets with single, triple and quintuplicate layers as anode materials exhibit a high reversible capacity of 1175, 1007, and 842 mA h g{sup -1}, respectively, which show that the graphene sheets with fewer layers have higher reversible capacity. -- Graphical abstract: The typical TEM images of the graphene sheets derived from GO3(a), GO2(b) and GO1(c). Display Omitted Highlights: {yields} With the oxidation degree of GO increasing, the numbers of graphene layers decreased. {yields} With the numbers of graphene layers decreasing, the reversible capacity improved. {yields} Graphene sheets with single-layer exhibit the best electrochemical performances.

• OSTI ID: 21494294
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 5; Other Information: DOI: 10.1016/j.jssc.2011.03.004; PII: S0022-4596(11)00101-0; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANODES
ATOMIC FORCE MICROSCOPY
CAPACITY
ELECTRIC BATTERIES
ELECTROCHEMISTRY
FOURIER TRANSFORM SPECTROMETERS
GRAPHITE
GRAVIMETRIC ANALYSIS
HYDROGEN
LAYERS
LITHIUM IONS
OXIDATION
REDUCTION
SCANNING ELECTRON MICROSCOPY
SHEETS
SYNTHESIS
THERMAL EXPANSION
TRANSMISSION ELECTRON MICROSCOPY
VALENCE
CARBON
CHARGED PARTICLES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHEMISTRY
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTRON MICROSCOPY
ELEMENTS
ENERGY STORAGE SYSTEMS
ENERGY SYSTEMS
EXPANSION
IONS
MEASURING INSTRUMENTS
MICROSCOPY
MINERALS
NONMETALS
QUANTITATIVE CHEMICAL ANALYSIS
SPECTROMETERS