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Growth of Hierarchical 3D Mesoporous NiSix/NiCo2O4 Core/Shell Heterostructures on Nickel Foam for Lithium-Ion Batteries

Authors

  • Qiaobao Zhang,

    1. Department of Mechanical and Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong
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    • These authors contributed equally to this work.

  • Huixin Chen,

    1. State Key Laboratory for Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Department of Chemistry, Xiamen University, Xiamen, 361005 (PR China)
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    • These authors contributed equally to this work.

  • Jiexi Wang,

    1. School of Metallurgy and Environment, Central South University, Changsha, 410083 (PR China)
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  • Daguo Xu,

    1. Department of Mechanical and Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong
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  • Xinhai Li,

    1. School of Metallurgy and Environment, Central South University, Changsha, 410083 (PR China)
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  • Yong Yang,

    Corresponding author
    1. State Key Laboratory for Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Department of Chemistry, Xiamen University, Xiamen, 361005 (PR China)
    • Yong Yang, State Key Laboratory for Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Department of Chemistry, Xiamen University, Xiamen, 361005 (PR China)===

      Kaili Zhang, Department of Mechanical and Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong===

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  • Kaili Zhang

    Corresponding author
    1. Department of Mechanical and Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong
    • Yong Yang, State Key Laboratory for Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Department of Chemistry, Xiamen University, Xiamen, 361005 (PR China)===

      Kaili Zhang, Department of Mechanical and Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong===

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Abstract

We demonstrate the facile and well-controlled design and fabrication of heterostructured and hierarchical 3D mesoporous NiSix/NiCo2O4 core/shell nanowire arrays on nickel foam through a facile chemical vapor deposition (CVD) technique combined with a simple but powerful chemical bath deposition (CBD) technique. The smart hybridization of NiCo2O4 and NiSix nanostructures results in an intriguing mesoporous hierarchical core/shell nanowire-array architecture. The nanowire arrays demonstrate enhanced electrochemical performance as binder- and conductive-agent-free electrodes for lithium ion batteries (LIBs) with excellent capacity retention and high rate capability on cycling. The electrodes can maintain a high reversible capacity of 1693 mA h g−1 after 50 cycles at 200 mA g−1. Given the outstanding performance and simple, efficient, cost-effective fabrication, we believe that these 3D NiSix/NiCo2O4 core/shell heterostructured arrays have great potential application in high-performance LIBs.

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