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  • A promising supercapacitor electrode material of CuBi2O4 hierarchical microspheres synthesized via a coprecipitation route

    Author(s)
    Zhang, Y.C
    Yang, H
    Wang, W.P
    Zhang, H.M
    Li, R.S
    Wang, X.X
    Yu, R.C
    Griffith University Author(s)
    Zhang, Haimin
    Year published
    2016
    Metadata
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    Abstract
    CuBi O hierarchical microspheres are synthesized via a coprecipitation method, where the effect of the NaOH concentration in precursor solution on the product morphology is investigated. At n(NaOH) = 1 M, irregular microspheres of 0.5-1 μm are produced. With increase in the concentration of NaOH, the microspheres grow bigger in size and more regular in morphology. When the NaOH concentration is increased up to 6 M, regular microspheres of 4-6 μm in diameter are obtained. These microspheres are constructed from nanorods with 30-60 nm in diameter and 200-400 nm in length via the hierarchical self-assembly process. The ...
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    CuBi O hierarchical microspheres are synthesized via a coprecipitation method, where the effect of the NaOH concentration in precursor solution on the product morphology is investigated. At n(NaOH) = 1 M, irregular microspheres of 0.5-1 μm are produced. With increase in the concentration of NaOH, the microspheres grow bigger in size and more regular in morphology. When the NaOH concentration is increased up to 6 M, regular microspheres of 4-6 μm in diameter are obtained. These microspheres are constructed from nanorods with 30-60 nm in diameter and 200-400 nm in length via the hierarchical self-assembly process. The electrochemical performances of the as-prepared samples are investigated by cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge-discharge. It is demonstrated that the sample composed of 0.5-1 μm microspheres exhibits the highest specific capacity, reaching about 1895 F g in a 2 M KOH electrolyte at a measured current density of 1 A g . This value is larger than the specific capacity for most transition metal oxides. Due to its excellent electrochemical performance, CuBi O could find a promising application as the supercapacitor electrode material. 2 4 2 4 -1 -1
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    Journal Title
    Journal of Alloys and Compounds
    Volume
    684
    DOI
    https://doi.org/10.1016/j.jallcom.2016.05.201
    Subject
    Condensed matter physics
    Materials engineering
    Resources engineering and extractive metallurgy
    Publication URI
    http://hdl.handle.net/10072/405333
    Collection
    • Journal articles

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