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Multidimensional and hierarchical carbon-confined cobalt phosphide nanocomposite as advanced anodes for lithium and sodium storage

Abstract

Transition metal phosphides possess remarkable theoretical charge capacity, which however undergo poor intrinsic electrical conductivity and huge structure change during cycling. Herein, a novel, multidimensional and hierarchical nanostructure is synthesized, which constitutes 0D CoP nanoparticles distrbuted in 1D dual carbon matrix, that are further homogenously encapsulated in 3D graphene (GR) network, this material is denoted as CoP@DC@GR. Such 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 1D dual carbon matrix guarantees a robust structure to withstand the mechanical stress of 1D dual carbon matrix and 1D dual carbon matrix can relieve the volume inflation of 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. Owning to this multiscale coordinated design, the CoP@DC@GR nanocomposite demonstrates high charge capacity, remarkable cycle stability, and distinguished rate performance, thereby possessing fascinating potential as anodes 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, 2018, Accepted Manuscript
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    Multidimensional and hierarchical carbon-confined cobalt phosphide nanocomposite as advanced anodes for lithium and sodium storage

    B. Wang, K. Chen, G. Wang, X. Liu, H. Wang and J. Bai, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR07076H

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