Journal
ELECTROCHIMICA ACTA
Volume 56, Issue 13, Pages 4876-4881Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.03.027
Keywords
Cobalt oxide; Nanostructure; Anode; Lithium ion battery
Categories
Funding
- National Natural Science Foundation of China [51002117, 51071117]
- National Basic Research Program of China [2010CB635101]
- Fundamental Research Funds for the Central Universities [0109-08141012]
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Hierarchical Co3O4 nanostructure is synthesized via a self-assembled process in molten hydroxides. The morphologies, crystal structures and the phase transformation processes are analyzed by field-emission scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. As an anode material for lithium ion batteries, the hierarchical Co3O4 exhibit an initial capacity of 1336 mAh g(-1) and a stable capacity of 680 mAh g(-1) over 50 cycles. More importantly, high rate capability is obtained at different current densities between 140 and 1120 mA g(-1). The improved electrochemical performance of Co3O4 could be attributed to the unique hierarchical nanostructure. (C) 2011 Elsevier Ltd. All rights reserved.
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