期刊
NANOSCIENCE AND NANOTECHNOLOGY LETTERS
卷 4, 期 4, 页码 378-383出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/nnl.2012.1333
关键词
MoS2; Carbon Nanotubes; Lithium Ion Batteries; Solvothermal; Composite
资金
- National Natural Science Foundation of China [21173190]
- Research Fund for the Doctoral Program of Higher Education of China [20110101130003]
- Research Fund for the International Cooperative Project
- China Hubei Provincial Science & Technology Department [2011BFA002]
- National Research Foundation of Korea
- Korean government [2010-0029617]
MoS2/carbon nanotube (CNT) composites were prepared through a simple solvothermal method with Na2MoO4 and KSCN as reactants and ethylene glycol as solvent in the presence of CNTs. The crystalline structure and morphology of the products were characterized by X-ray diffraction and scanning electron microscopy (SEM). The SEM images show that the MoS2/CNT composite is composed of two-dimensional nanoflake structures with thickness of 20 to 30 nm and that these nanoflakes self-assemble into microspheres that are 500 nm in size and surrounded by a coating of CNTs. As an electrode material for the lithium ion battery, the MoS2/CNT electrode exhibits a high reversible capacity of 978.5 mAh/g. It shows higher capacity and better cycling stability than the pure MoS2. Based on the electrical impedance spectra, the MoS2/CNT composite has much lower impedance than the pure MoS2. The present results suggest that the MoS2/CNT composite is a promising anode material for lithium ion battery application. This study may pave a way to improve the electrochemical properties of functional materials through a unique synergy at the nanoscale.
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