Journal
MATERIALS LETTERS
Volume 105, Issue -, Pages 169-172Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2013.04.057
Keywords
Nanomaterials; Nanocomposites; Energy storage; Lithium-ion battery
Funding
- National Natural Science Foundation of China [51102041, 11104025]
- Fundamental Research Funds for the Central Universities [N120405010, N120205001]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20110042120024]
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SnO2-MnO2-SnO2 sandwich-structured nanotubes are synthesized by uniformly coating SnO2 nanoparticles on both the inner and outer walls of alpha-MnO2 nanotubes via a simple wet-chemical route. As the anodes of lithium ion batteries, SnO2-MnO2-SnO2 sandwich-structured nanotubes exhibit high reversible capacity, cyclability and rate capability. The reversible capacity of the nanocomposites is 847.5 mAh/g and retains 716.0 mAh/g after 50 cycles, which is higher than that of alpha-MnO2 or SnO2. At 20C rate, SnO2-MnO2-SnO2 sandwich-structured nanotubes can deliver a capacity of 224.2 mAh/g. Such excellent performances can be attributed to the synergistic effect and the tubular nanostructures. Our results imply that one-dimensional sandwich-structured nanocomposites have potential applications in lithium ion batteries. (C) 2013 Elsevier B.V. All rights reserved.
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