Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 183, Issue 9, Pages 2116-2120Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2010.07.011
Keywords
Mesophase pitch; Exfoliated graphite nanoplatelets; Nanocomposite; Anode material; Lithium-ion batteries
Funding
- National Natural Science Foundation of China [50902102]
- Tianjin Application Bases and Advanced Technology Research Program [08JCZDJC17000]
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Mesophase pitch (MP)/exfoliated graphite nanoplatelets (GNPs) nanocomposite has been prepared by an efficient method with an initiation of graphite intercalation compounds (GIC). X-ray diffraction, optical microscopy, high-resolution transmission electron microscopy and scanning electron microscopy analysis techniques are used to characterize the samples. It is observed that GIC has exfoliated completely into GNPs during the formation of MP/GNPs nanocomposite and the GNPs are distributed uniformly in MP matrix, which represent a conductive path for a movement of electrons throughout the composites. Electrochemical tests demonstrate that the carbonized MP/GNPs nanocomposite displays higher capacity and better cycle performance in comparison with the pure carbonized MP. It is concluded that such a large improvement of electrochemical performance within the nanocomposite may in general be related to the enhanced electronic conductivity, which is achieved by good dispersion of GNPs within MP matrix and formation of a 3D network of GNPs. Crown Copyright (C) 2010 Published by Elsevier Inc. All rights reserved.
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