期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 30, 页码 15056-15061出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm31629c
关键词
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资金
- China Postdoctoral Science Foundation [20100481401]
- Zhejiang Province Education Department Scientific Research Project [Y201119640]
- Fundamental Research Funds for the Central Universities [2011QNA4006]
- Key Science and Technology Innovation Team of Zhejiang Province [2010R50013]
We report on the synthesis of a Co3O4-C core-shell nanowire array and its application as an anode material for lithium ion batteries. The core-shell nanowire array is prepared by combining a facial hydrothermal synthesis and direct current magnetron sputtering. The amorphous carbon layer with a thickness of 18 nm is homogeneously coated on the surface of the porous Co3O4 nanowire. The Co3O4-C core-shell nanowire array delivers an initial discharge capacity of 1330.8 mA h g(-1) at 0.5 C and maintains a high reversible capacity of 989.0 mA h g(-1) after 50 cycles, much higher than the unmodified Co3O4 nanowire array (490.5 mA h g(-1)). The improved electrochemical performance can be attributed to the introduction of a thin carbon layer, which improves the electrical conductivity and structure stability of the Co3O4 nanowire array.
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