Journal
JOURNAL OF POWER SOURCES
Volume 239, Issue -, Pages 37-44Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2013.03.105
Keywords
Iron oxide; Carbon coated; Graphene nanosheet support; Electrochemical performance; Lithium ion batteries
Funding
- International cooperation research program of National Natural Science Foundation of China [21061130551]
- Key Laboratory Foundation of the Education Committee of Shaanxi Province [12JS096]
- Xi'an Industrial Technology Innovation Project-technology transfer promoting program [CX12182-4]
- Science Foundation of Northwest University (NWU) [PR12210]
- NWU Training Program of Innovation and Entrepreneurship for Undergraduates [2012057]
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A hybrid material of carbon-coated Fe2O3 submicro-particles loaded on graphene nanosheets (Fe2O3@C/GN5) is prepared by a two step route including a hydrothermal and a subsequent glucose impregnation-pyrolysis process. The obtained material is composed of GNs and similar to 400 nm size Fe2O3 particles coated by thin carbon layer with a thickness of 5 nm. As an anode material for lithium ion batteries, Fe2O3@C/GN5 hybrid shows an improved electrochemical performance in the initial coulombic efficiency (71%), reversible capacity (900 mA h g(-1) after 50 cycles at a current of 200 mA g(-1)) and capacity retention rate (82% after 50 cycles). This result is much better than the synthesized bare Fe2O3 and Fe2O3/GN5 electrodes. In addition to the contribution of GNs, the carbon-coated layer around Fe2O3 particles is believed to be a key factor to improve the electrochemical performance of Fe2O3. (C) 2013 Elsevier B.V. All rights reserved.
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