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    Corncob-shaped ZnFe2O4/C nanostructures for improved anode rate and cycle performance in lithium-ion batteries

    Access Status
    Fulltext not available
    Authors
    Mao, J.
    Hou, X.
    Wang, X.
    He, G.
    Shao, Zongping
    Hu, S.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Mao, J. and Hou, X. and Wang, X. and He, G. and Shao, Z. and Hu, S. 2015. Corncob-shaped ZnFe2O4/C nanostructures for improved anode rate and cycle performance in lithium-ion batteries. RSC Advances. 5 (40): pp. 31807-31814.
    Source Title
    RSC Advances
    DOI
    10.1039/c5ra04790k
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/33065
    Collection
    • Curtin Research Publications
    Abstract

    Novel corncob-shaped ZnFe2O4/C nanostructured composite materials have been successfully synthesized through a facile co-precipitation method with carbamide as carbonaceous matrix. The morphology and structure of the samples were characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM) and transition electron microscopy (TEM), and the physical and electrochemical properties were tested by thermogravimetry and an electrochemical system. The corncob-shaped ZnFe2O4/C nanostructured anode materials exhibit outstanding cycling performance and rate capability in comparison with pure ZnFe2O4 anode materials. Electrochemical results show that the corncob-shaped ZnFe2O4/C nanocomposite materials exhibit an initial discharge capacity of approximately 1591.6 mA h g−1 with an initial coulombic efficiency of 80.4% at a constant density of 100 mA g−1. A reversible discharge capacity of 1119.1 mA h g−1 is still obtained after 100 cycles. The discharge capacities can still be as high as 889 mA h g−1 at a high rate of 4 C (1 C = 250 mA g−1). The excellent electrochemical performances are probably ascribed to the multiple synergetic factors that stem from their uniform nanoparticle size, complete crystallization with corncob shape, and organic pyrolysis of carbon inlaid in the corncob shaped nanostructure. The corncob-shaped ZnFe2O4/C nanocomposite will be a promising anode material for advanced lithium ion batteries.

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