Journal
ELECTROCHIMICA ACTA
Volume 212, Issue -, Pages 179-186Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.06.135
Keywords
Anode; Carbon nanotubes; Fe3O4; High performance; Lithium-ion batteries
Categories
Funding
- Chinese Academy of Sciences Innovative and Interdisciplinary Team Award
- Changjiang Scholars Program [T2011170]
- National Nature Science Foundation of China [21576135]
- Major Project of Educational Commission of Jiangsu Province of China [13KJA430004]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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Here, we showed that relatively high content of Fe3O4 nanoparticles (up to 83 wt. %) can be homogeneously dispersed into carbon nanotubes (CNTs) conductive networks using non-aqueous media by refluxing method. Three different Fe3O4-CNTs composites were prepared, i.e., Fe3O4-CNTs-50, Fe3O4-CNTs-80 and Fe3O4-CNTs-90 that contain increasing amount of Fe3O4 from 50 wt. % to 83 wt. % and to 89 wt. %. These composites have higher surface area and higher pore volume than Fe3O4 component due to CNTs content. The best composite, i.e., Fe3O4-CNTs-80 demonstrated negligible capacity loss up to 100 cycles and high discharge capacity of 930 mA h g(1) at 100th cycle and 100 mA g(1) current discharge rate. This composite also exhibited excellent rate capability where up to the 78.8% of original capacity can be retained at high current discharge rate of 1000 mA g(1). These performances were enabled by a unique porous architecture based on homogenous dispersion of Fe3O4 nanoparticles into CNTs networks that leads to short Li+ diffusion path, high electric conductivity and buffering space to accommodate large volume change of Fe3O4 component during the charge-discharge processes. (C) 2016 Elsevier Ltd. All rights reserved.
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