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Issue 3, 2019
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A multidimensional and hierarchical carbon-confined cobalt phosphide nanocomposite as an advanced anode for lithium and sodium storage

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Abstract

Transition metal phosphides possess remarkable theoretical charge capacities; however, they demonstrate poor intrinsic electrical conductivity and enormous structure changes during cycling. Herein, a novel, multidimensional and hierarchical nanostructure is synthesized which constitutes 0D CoP nanoparticles distrbuted in a 1D dual carbon matrix and further homogenously encapsulated in a 3D graphene (GR) network; this material is denoted as CoP@DC@GR. This synergistic design produces superior advantages for lithium and sodium storage: (i) the ultrasmall and highly dispersed 0D CoP nanoparticles embedded in the 1D dual carbon matrix can decrease the electron/ion transport paths; (ii) the 3D interconnected architecture constructed from 2D GR and the 1D dual carbon matrix guarantees a robust structure to withstand the mechanical stress of the 1D dual carbon matrix, which can relieve volume inflation of the 0D CoP nanoparticles; (iii) the 1D dual carbon matrix and 3D GR frame structure offer continuous electron/ion transport routes, thus promoting rapid reaction kinetics. Due to this multiscale coordinated design, the CoP@DC@GR nanocomposite demonstrates high charge capacity, remarkable cycle stability, and distinguished rate performance; therefore, it possesses fascinating potential in anodes for lithium and sodium storage.

Graphical abstract: A multidimensional and hierarchical carbon-confined cobalt phosphide nanocomposite as an advanced anode for lithium and sodium storage

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Publication details

The article was received on 31 Aug 2018, accepted on 30 Nov 2018 and first published on 03 Dec 2018


Article type: Paper
DOI: 10.1039/C8NR07076H
Citation: Nanoscale, 2019,11, 968-985

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    A multidimensional and hierarchical carbon-confined cobalt phosphide nanocomposite as an advanced anode for lithium and sodium storage

    B. Wang, K. Chen, G. Wang, X. Liu, H. Wang and J. Bai, Nanoscale, 2019, 11, 968
    DOI: 10.1039/C8NR07076H

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