Journal
ELECTROCHIMICA ACTA
Volume 130, Issue -, Pages 119-126Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.02.131
Keywords
beta-Na-0.33 V2O5; Flake-like structure; Structural stability; Cathode material; Lithium ion batteries
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Funding
- National High Technology Research and Development Program of China (863 Program) [2013AA110106]
- National Natural Science Foundation of China [51374255, 51202323]
- Program for New Century Excellent Talents in University [NCET-13-0594]
- Research Fund for the Doctoral Program of Higher Education of China [201301621200]
- Natural Science Foundation of Hunan Province, China [14JJ3018]
- Lie-Ying Program of Central South University
- Fundamental Research Funds for the Central Universities of Central South University [2013zzts181]
- Hunan Provincial Innovation Foundation For Postgraduate
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Mesoporous flake-like beta-Na-0.33 V2O5 has been successfully fabricated via a facile hydrothermal reaction with subsequent calcinations. The flake-like beta-Na0.33V2O5 particles with an average thickness of about 100 nm, are composed of small nanorods, exhibiting the mesoporous structures. The electrochemical performance demonstrate that beta-Na0.33V2O5 with 3D tunneled crystal structure has high specific discharge capacity, good rate capability and cyclic stability. It delivers high specific discharge capacities of 339 and 226 mA h g(-1) at the current densities of 20 and 300 mA g(-1), respectively. The structural stability of beta-Na0.33V2O5 upon cycling has been investigated by ex-situ X-ray diffraction (XRD), which indicates the beta-Na0.33V2O5 has excellent crystal structural reversibility in the voltage range of 1.5-4V. Considering its surprising distinct plateaus and excellent structural stability, the beta-Na0.33V2O5 material is a promising cathode material for lithium ion batteries. (C) 2014 Elsevier Ltd. All rights reserved.
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