期刊
NANO ENERGY
卷 13, 期 -, 页码 592-600出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2015.03.028
关键词
Lithium-selenium batteries; Selenium nanowire; Polyaniline; Core-shell; Graphene; Electrochemical performance
类别
资金
- 973 Project of China [2011CB935901]
- National Natural Science Fund of China [91022033, 21201158, 21471142]
A novel nanocomposite of graphene-encapsulated selenium/polyaniline core shell nanowires (G@Se/PANI) has been designed and synthesized under the condition of low temperature without heating and investigated as a cathode material for Li-ion batteries. In this nanocomposite, selenium nanowires are well-sealed in the PANI layer with a thickness of approximate to 25 nm forming a core/shell structure and then the Se/PANI core-shell nanowires are uniformly encapsulated in the graphene nanosheets. As expected, the G@Se/PANI nanocomposite exhibits enhanced cycling performance and high-rate capability. The G@Se/PANI nanocomposite displays a reversible discharge capacity of 567.1 mA h/g at 0.2 C after 200th cycle and 510.9 mA h/g at 2 C, which could be associated with the highly electrical conductivity of graphene sheets and the unique PANI shell, together with the one-dimensional structure of selenium in the G@Se/PANI nanocomposite. (C) 2015 Elsevier Ltd. All rights reserved.
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