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Hierarchical MoSe2 yolk-shell microspheres with superior Na-ion storage properties
- Authors
- Ko, Y. N.; Choi, S. H.; Park, S. B.; Kang, Y. C.
- Issue Date
- 2014
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- NANOSCALE, v.6, no.18, pp.10511 - 10515
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANOSCALE
- Volume
- 6
- Number
- 18
- Start Page
- 10511
- End Page
- 10515
- ISSN
- 2040-3364
- 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 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.
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