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Issue 22, 2014
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Improved lithium ion battery performance by mesoporous Co3O4 nanosheets grown on self-standing NiSix nanowires on nickel foam

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Abstract

Novel three-dimensional (3D) hierarchical NiSix/Co3O4 core–shell nanowire arrays composed of NiSix nanowire cores and branched Co3O4 nanosheet shells have been successfully synthesized by combining chemical vapor deposition and a simple but effective chemical bath deposition process followed by a calcination process. The resulting hierarchical NiSix/Co3O4 core–shell nanowire arrays directly serve as binder- and conductive-agent-free electrodes for lithium ion batteries, which demonstrate remarkably improved electrochemical performances with excellent capacity retention and high rate capability on cycling. They can maintain a stable reversible capacity of 1279 mA h g−1 after 100 cycles at a current density of 400 mA g−1 and a capacity higher than 340 mA h g−1 even at a current density as high as 8 A g−1. Such superior electrochemical performance of the electrodes made by directly growing electro-active highly porous Co3O4 on a nanostructured NiSix conductive current collector makes them very promising for applications in high-performance lithium ion batteries.

Graphical abstract: Improved lithium ion battery performance by mesoporous Co3O4 nanosheets grown on self-standing NiSix nanowires on nickel foam

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Publication details

The article was received on 25 Feb 2014, accepted on 24 Mar 2014 and first published on 25 Mar 2014


Article type: Paper
DOI: 10.1039/C4TA00967C
Citation: J. Mater. Chem. A, 2014,2, 8483-8490
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    Improved lithium ion battery performance by mesoporous Co3O4 nanosheets grown on self-standing NiSix nanowires on nickel foam

    H. Chen, Q. Zhang, J. Wang, D. Xu, X. Li, Y. Yang and K. Zhang, J. Mater. Chem. A, 2014, 2, 8483
    DOI: 10.1039/C4TA00967C

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