Hierarchical MoS2 Hollow Architectures with Abundant Mo Vacancies for Efficient Sodium Storage

Yang Li, Rupeng Zhang, Wei Zhou, Xin Wu, Huabin Zhang, Jian Zhang

Research output: Contribution to journalArticlepeer-review

137 Scopus citations

Abstract

Achieving a molecular level understanding of surface performance of nanomaterials by modulating the electronic structure is important but challenging. Here, we have developed a hollow microcube framework constructed by Mo-defect-rich ultrathin MoS2 nanosheets (HMF-MoS2) through a zeolite-like-framework-engaged strategy. The hollow structured HMF-MoS2 delivers an impressive specific capacity (384.3 mA h g-1 after 100 cycles at 100 mA g-1) and cycle stability (267 mA h g-1 after 125 cycles at 1 A g-1) for sodium storage. As evidenced by experiments and density functional theory calculations, abundant Mo vacancies in MoS2 can greatly accelerate the charge transfer and enhance the interaction between MoS2 and sodium, resulting in the promotion of sodium storage. Kinetic analysis result reveals that the ultrafast sodium ion storage of HMF-MoS2 could be associated with the significant contribution of capacitive energy storage. This work highlights the detailed molecular level understanding of chemical reaction on MoS2 surface by defect and morphology engineering, which can be applied to other metal sulfides for energy storage devices.
Original languageEnglish (US)
Pages (from-to)5533-5540
Number of pages8
JournalACS Nano
Volume13
Issue number5
DOIs
StatePublished - May 28 2019
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Materials Science(all)
  • Engineering(all)

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