Synergetic Effect of Yolk-Shell Structure and Uniform Mixing of SnS-MoS2 Nanocrystals for Improved Na-Ion Storage Capabilities

Seung Ho Choi, Yun Chan Kang

    Research output: Contribution to journalArticlepeer-review

    108 Citations (Scopus)

    Abstract

    Mixed metal sulfide composite microspheres with a yolk-shell structure for sodium-ion batteries are studied. Tin-molybdenum oxide yolk-shell microspheres prepared by a one-pot spray pyrolysis process transform into yolk-shell SnS-MoS2 composite microspheres. The discharge capacities of the yolk-shell and dense-structured SnS-MoS2 composite microspheres for the 100th cycle are 396 and 207 mA h g-1, and their capacity retentions measured from the second cycle are 89 and 47%, respectively. The yolk-shell SnS-MoS2 composite microspheres with high structural stability during repeated sodium insertion and desertion processes have low charge-transfer resistance even after long-term cycling. The synergetic effect of the yolk-shell structure and uniform mixing of the SnS and MoS2 nanocrystals result in the excellent sodium-ion storage properties of the yolk-shell SnS-MoS2 composite microspheres by improving their structural stability during cycling.

    Original languageEnglish
    Pages (from-to)24694-24702
    Number of pages9
    JournalACS Applied Materials and Interfaces
    Volume7
    Issue number44
    DOIs
    Publication statusPublished - 2015 Nov 11

    Keywords

    • anode material
    • metal sulfide
    • nanostructure
    • sodium batteries
    • spray pyrolysis

    ASJC Scopus subject areas

    • General Materials Science

    Fingerprint

    Dive into the research topics of 'Synergetic Effect of Yolk-Shell Structure and Uniform Mixing of SnS-MoS2 Nanocrystals for Improved Na-Ion Storage Capabilities'. Together they form a unique fingerprint.

    Cite this