Structure and electrochemical performance of nanostructured Fe3O4/carbon nanotube composites as anodes for lithium ion batteries |
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Authors: | Yang He Jin-Shu Cai |
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Affiliation: | Department of chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China |
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Abstract: | Polyvinyl alcohol (PVA) was used as a hydrogen bond functionalizing agent to modify multi-walled carbon nanotubes (CNTs). Nanoparticles of Fe3O4 were then formed along the sidewalls of the as-modified CNTs by the chemical coprecipitation of Fe2+ and Fe3+ in the presence of CNTs in an alkaline solution. The structure and electrochemical performance of the Fe3O4/CNTs nanocomposite electrodes have been investigated in detail. Electrochemical tests indicated that at the 145th cycle, the CNTs-66.7 wt.%Fe3O4 nanocomposite electrode can deliver a high discharge capacity of 656 mAh g−1 and stable cyclic retention. The improvement of reversible capacity and cyclic performance of the Fe3O4/CNTs nanocomposite could be attributed to the nanosized Fe3O4 particles and the network of CNTs. |
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Keywords: | Multi-walled carbon nanotubes Fe3O4 nanoparticles Composite Electrochemical properties Lithium ion batteries |
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