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  • Green Fabrication of Ultrathin Co3O4 Nanosheets from Metal–Organic Framework for Robust High-Rate Supercapacitors

    Author(s)
    Xiao, Zhenyu
    Fan, Lili
    Xu, Ben
    Zhang, Shanqing
    Kang, Wenpei
    Kang, Zixi
    Lin, Huan
    Liu, Xiuping
    Zhang, Shiyu
    Sun, Daofeng
    Griffith University Author(s)
    Zhang, Shanqing
    Year published
    2017
    Metadata
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    Abstract
    Two-dimensional cobalt oxide (Co3O4) is a promising candidate for robust electrochemical capacitors with high performance. Herein, we use 2,3,5,6-tetramethyl-1,4-diisophthalate as a recyclable ligand to construct a Co-based metal–organic framework of UPC-9, and subsequently, we obtain ultrathin hierarchical Co3O4 hexagonal nanosheets with a thickness of 3.5 nm through a hydrolysis and calcination process. A remarkable and excellent specific capacitance of 1121 F·g–1 at a current density of 1 A·g–1 and 873 F·g–1 at a current density of 25 A·g–1 were achieved for the as-prepared asymmetric supercapacitor, which can be attributed ...
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    Two-dimensional cobalt oxide (Co3O4) is a promising candidate for robust electrochemical capacitors with high performance. Herein, we use 2,3,5,6-tetramethyl-1,4-diisophthalate as a recyclable ligand to construct a Co-based metal–organic framework of UPC-9, and subsequently, we obtain ultrathin hierarchical Co3O4 hexagonal nanosheets with a thickness of 3.5 nm through a hydrolysis and calcination process. A remarkable and excellent specific capacitance of 1121 F·g–1 at a current density of 1 A·g–1 and 873 F·g–1 at a current density of 25 A·g–1 were achieved for the as-prepared asymmetric supercapacitor, which can be attributed to the ultrathin 2D morphology and the rich macroporous and mesoporous structures of the ultrathin Co3O4 nanosheets. This synthesis strategy is environmentally benign and economically viable due to the fact that the costly organic ligand molecules are recycled, reducing the materials cost as well as the environmental cost for the synthesis process.
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    Journal Title
    ACS Applied Materials and Interfaces
    Volume
    9
    Issue
    48
    DOI
    https://doi.org/10.1021/acsami.7b10309
    Subject
    Chemical Sciences not elsewhere classified
    Chemical Sciences
    Engineering
    Publication URI
    http://hdl.handle.net/10072/373649
    Collection
    • Journal articles

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