期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 11, 期 6, 页码 1320-1324出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2009.04.036
关键词
Lithium-ion batteries; Graphene nanosheets; Graphite; Cycle performance; AC impedance
资金
- Foundation of Excellent Doctoral Dissertation of Beijing City [YB20081001001]
Graphene nanosheets (GNSs) were prepared from artificial graphite by oxidation, rapid expansion and ultrasonic treatment. The morphology, structure and electrochemical performance of GNSs as anode material for lithium-ion batteries were systematically investigated by high-resolution transmission electron microscope, scanning electron microscope, X-ray diffraction, Fourier transform infrared spectroscopy and a variety of electrochemical testing techniques. It was found that GNSs exhibited a relatively high reversible capacity of 672 mA h/g and fine cycle performance. The exchange current density of GNSs increased with the growth of cycle numbers exhibiting the peculiar electrochemical performance. (C) 2009 Elsevier B.V. All rights reserved.
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