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

Y. N. Ko, S. H. Choi, S. B. Park, Yun Chan Kang

Research output: Contribution to journalArticle

169 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 languageEnglish
Pages (from-to)10511-10515
Number of pages5
JournalNanoscale
Volume6
Issue number18
DOIs
Publication statusPublished - 2014 Sep 21

ASJC Scopus subject areas

  • Materials Science(all)

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