期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 184, 期 5, 页码 982-989出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2011.03.004
关键词
Graphene sheets; Lithium-ion battery; Number of layers
资金
- National Basic Research Program of China (973 Program) [2009CB626611]
- National Natural Science Foundation of China [21061130551, 20873099, 10974152]
- Ph.D. Programs Foundation of Ministry of Education of China [20096101110002]
- NWU [09YYB04, 07YJC03, 09YJC28]
High quality graphene sheets are synthesized through efficient oxidation process followed by rapid thermal expansion and reduction by H(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, thermogravimetric 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(-1), respectively, which show that the graphene sheets with fewer layers have higher reversible capacity. (C) 2011 Elsevier Inc. All rights reserved.
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