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Issue 8, 2019
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Embedding CoO nanoparticles in a yolk–shell N-doped porous carbon support for ultrahigh and stable lithium storage

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Abstract

Despite great progress, the development of anode materials with excellent properties for high-performance lithium-ion batteries (LIBs) remains challenging. Rational design and synthesis of novel hybrid nanomaterials that synergistically integrate the structural/compositional advantages of their components provides exciting opportunities and solutions. Here, we demonstrate a dilute atmosphere pyrolysis strategy for the one-step synthesis of a new hybrid nanomaterial, CoO/C yolk–shell nanostructures (CoO/C YSNSs), from a Co-containing metal–organic framework precursor, ZIF-67. The CoO/C YSNSs integrate CoO and carbon into a unique hierarchical and quasi-homostructural architecture, in which both the yolk and shell comprise ultrafine CoO nanoparticles homogeneously embedded in highly porous, conductive and N-doped carbon. Benefiting from such structural and compositional features, CoO/C YSNSs deliver ultrahigh and stable lithium storage performances (retained capacity up to 1970 and 680 mA h g−1 even after 1000 charge/discharge cycles at a current density of 100 and 1000 mA g−1, respectively), and rank among the best cobalt oxide-based anode materials. The formation of CoO/C YSNSs is also investigated and attributed to two synergistic processes of dynamic redox competition and heterogeneous contraction. Our work provides new stimuli to the development of complex hybrid nanostructure-based advanced electrode materials for high-performance batteries.

Graphical abstract: Embedding CoO nanoparticles in a yolk–shell N-doped porous carbon support for ultrahigh and stable lithium storage

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Publication details

The article was received on 16 Nov 2018, accepted on 23 Jan 2019 and first published on 24 Jan 2019


Article type: Paper
DOI: 10.1039/C8TA11007G
Citation: J. Mater. Chem. A, 2019,7, 4036-4046

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    Embedding CoO nanoparticles in a yolk–shell N-doped porous carbon support for ultrahigh and stable lithium storage

    S. Wang, J. Teng, Y. Xie, Z. Wei, Y. Fan, J. Jiang, H. Wang, H. Liu, D. Wang and C. Su, J. Mater. Chem. A, 2019, 7, 4036
    DOI: 10.1039/C8TA11007G

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