Hierarchical MoSe2 yolk-shell microspheres with superior Na-ion storage properties

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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 m Ahg(-1) 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.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2014
Language
English
Article Type
Article
Keywords

EXCELLENT ELECTROCHEMICAL PERFORMANCE; TRANSITION-METAL DICHALCOGENIDES; LITHIUM STORAGE; SODIUM-ION; HYDROGEN EVOLUTION; ANODE MATERIAL; THIN-FILM; BATTERIES; GRAPHENE; NANOSHEETS

Citation

NANOSCALE, v.6, no.18, pp.10511 - 10515

ISSN
2040-3364
DOI
10.1039/c4nr02538e
URI
http://hdl.handle.net/10203/192847
Appears in Collection
CBE-Journal Papers(저널논문)
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