期刊
JOURNAL OF POWER SOURCES
卷 258, 期 -, 页码 260-265出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2014.02.038
关键词
Iron oxide-Iron nanowires; Anode; Lithium-ion batteries; High rate performance
资金
- National Nature Science Foundation of China [21306033]
- Fundamental Research Funds for the Central Universities [HEUCF20130910013]
- Harbin Science and Technology Innovation Fund for Excellent Academic Leaders [2012RFXXG103]
A facile and green method is developed to fabricate Fe3O4-Fe nanowires with a large amount of nanoholes directly grown on highly conductive nanofiber arrays. By electrodeposition of Fe clusters on C/TiC nanofiber array, followed by in-situ chemical conversion of Fe to FeC2O4-Fe nanowires and the thermal decomposition of FeC2O4-Fe to Fe3O4-Fe, a Fe3O4-Fe nanocomposite electrode with unique architecture is successfully prepared. The electrode is characterized by means of X-ray diffractometer, scanning electron microscope and transmission electron microscope. Electrochemical properties of the nanowire arrays electrode as the anode of lithium-ion batteries are examined by cyclic voltammetry and galvanostatic charge/discharge test. The electrode displayed remarkably high capacity, excellent high rate performance and superior cycling stability. The reversible capacity of the electrode reached 1012 mAh g (-1) at 1C and retained to be 500 and 255 mAh g(-1) at 10 and 20C, respectively. It can still deliver a specific capacity of 100 mAh g(-1), even at 50C (72 s charge-discharge). The electrode also has a satisfactory cycling performance with capacity retention of 93.9% after 100 cycles at 1C. The magnificent performance can be attributed to the distinct configuration resulting from the novel fabrication process. (C) 2014 Elsevier B.V. All rights reserved.
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