期刊
ELECTROCHIMICA ACTA
卷 56, 期 16, 页码 5844-5848出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.04.071
关键词
MnO/C; Coaxial nanotubes; Lithium-ion batteries; Anode materials
资金
- Zhejiang University
- Fundamental Research Funds for the Central Universities [2010QNA4003]
- Ph.D. Programs Foundation of Ministry of Education of China [20100101120024]
- Foundation of Education Office of Zhejiang Province [Y201016484]
Coaxial MnO/C nanotubes with an average diameter of about 450 nm, a wall thickness of about 150 nm, a length of 1-5 mu m and a 10 nm thick carbon layer have been prepared using beta-MnO2 nanotubes as self-templates in acetylene at 600 degrees C. The microstructure of the product has been characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, and Raman spectroscopy. The electrochemical performance of the product has been evaluated by galvanostatic charge/discharge cycling. It is found that the product exhibits a reversible capacity of nearly 500 mAh g(-1) at a current density of 188.9 mA g(-1), and 83.9% of capacity retention, higher than bare MnO nanotubes (58.2%) and MnO nanoparticles (25.8%). The results reveal that coaxial MnO/C nanotubes would be a promising anode material for next-generation lithium-ion batteries. (C) 2011 Elsevier Ltd. All rights reserved.
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