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

Y. N. Ko; S. H. Choi; S. B. Park; Y. C. Kang

doi:10.1039/c4nr02538e

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

Y. N. Ko, S. H. Choi, S. B. Park, Y. C. Kang

Research output: Contribution to journal › Article › peer-review

230 Citations (Scopus)

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.

Original language	English
Pages (from-to)	10511-10515
Number of pages	5
Journal	Nanoscale
Volume	6
Issue number	18
DOIs	https://doi.org/10.1039/c4nr02538e
Publication status	Published - 2014 Sept 21

ASJC Scopus subject areas

General Materials Science

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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.",

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AU - Ko, Y. N.

AU - Choi, S. H.

AU - Park, S. B.

AU - Kang, Y. C.

PY - 2014/9/21

Y1 - 2014/9/21

N2 - 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.

AB - 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.

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DO - 10.1039/c4nr02538e

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

Abstract

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