Jump to main content
Jump to site search


Unraveling the Na-ion storage performance of a vertically aligned interlayer-expanded two-dimensional MoS2@C@MoS2 heterostructure

Author affiliations

Abstract

Achieving hierarchically uniform surface manipulated nanostructured materials is important to accomplish high performance storage devices, but it is still challenging. Herein, we successfully synthesized a vertically-aligned interlayer-expanded caterpillar-like heterostructure consisting of MoS2@C nanosheets (NSs) over MoS2 nanorods (NRs) (MoS2@C@MoS2) as an advanced anode material for sodium-ion batteries (SIBs). Step-wise ramp rate tuned MoS2 nanorods (NRs) were achieved via surface sulfurization of MoO3 NRs by a vapor phase ion-exchange method. Heterointerphased MoS2@C nanosheets performed a crucial role in enacting an excellent electrochemical performance by facilitating better Na+ ion diffusion and faster electron transport. The hierarchical MoS2@C@MoS2 electrode delivered a high specific capacity of 434 mA h g−1 (after 100 cycles at 100 mA g−1) and excellent cycling stability (352 mA h g−1 after 200 cycles at 1000 mA g−1). Kinetic analysis revealed that an enhanced sodium storage performance of the MoS2@C@MoS2 electrode could be accompanied by an ameliorated capacitive contribution reaction. Moreover, the sodium-ion full cell assembled with the MoS2@C@MoS2 anode and a Na3V2(PO4)2F3 cathode exhibited a high specific capacity of 320 mA h g−1 with good capacity retention.

Graphical abstract: Unraveling the Na-ion storage performance of a vertically aligned interlayer-expanded two-dimensional MoS2@C@MoS2 heterostructure

Back to tab navigation

Supplementary files

Publication details

The article was received on 13 Aug 2019, accepted on 29 Sep 2019 and first published on 01 Oct 2019


Article type: Paper
DOI: 10.1039/C9TA08839C
J. Mater. Chem. A, 2019, Advance Article

  •   Request permissions

    Unraveling the Na-ion storage performance of a vertically aligned interlayer-expanded two-dimensional MoS2@C@MoS2 heterostructure

    G. K. Veerasubramani, M. Park, G. Nagaraju and D. Kim, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C9TA08839C

Search articles by author

Spotlight

Advertisements