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Issue 18, 2014
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Hierarchical MoSe2 yolk–shell microspheres with superior Na-ion storage properties

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Abstract

Yolk–shell-structured MoSe2 microspheres were prepared via a simple selenization process of MoO3 microspheres. The yolk–shell-structured MoSe2 and MoO3 microspheres delivered initial discharge capacities of 527 and 465 mA h g−1 in the voltage range of 0.001–3 V vs. Na/Na+ at a current density of 0.2 A g−1, respectively, and their discharge capacities after 50 cycles were 433 and 141 mA h g−1, respectively. The yolk–shell-structured MoSe2 microspheres also exhibited outstanding high rate capabilities. The hierarchical yolk–shell structure comprised of wrinkled nanosheets facilitated fast Na-ion and electron kinetics, and buffered the large volume changes encountered during cycling.

Graphical abstract: Hierarchical MoSe2 yolk–shell microspheres with superior Na-ion storage properties

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Publication details

The article was received on 10 May 2014, accepted on 06 Jul 2014 and first published on 08 Jul 2014


Article type: Communication
DOI: 10.1039/C4NR02538E
Citation: Nanoscale, 2014,6, 10511-10515
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    Hierarchical MoSe2 yolk–shell microspheres with superior Na-ion storage properties

    Y. N. Ko, S. H. Choi, S. B. Park and Y. C. Kang, Nanoscale, 2014, 6, 10511
    DOI: 10.1039/C4NR02538E

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