Superelastic 3D few-layer MoS2/carbon framework heterogeneous electrodes for highly reversible sodium-ion batteries

Rational design of electrode materials for sodium-ion batteries with high flexibility is still challenging. Here, superelastic 3D few-layer MoS2/carbon framework heterogeneous electrodes (abbreviated as, MoS2@CF) are fabricated by a simple vacuum infiltration and heating process. The interconnected...

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Bibliographic Details
Published in:Nano energy 2018-06, Vol.48, p.526-535
Main Authors: Zhao, Zhi-Hao, Hu, Xu-Dong, Wang, Hongqiang, Ye, Meng-Yang, Sang, Zhi-Yuan, Ji, Hui-Ming, Li, Xiao-Lei, Dai, Yejing
Format: Article
Language:English
Subjects:
3D hierarchical structure
Sodium-ion batteries
Superelastic electrodes
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Summary:Rational design of electrode materials for sodium-ion batteries with high flexibility is still challenging. Here, superelastic 3D few-layer MoS2/carbon framework heterogeneous electrodes (abbreviated as, MoS2@CF) are fabricated by a simple vacuum infiltration and heating process. The interconnected ultrathin MoS2 network filled with carbon framework forms a 3D heterogeneous network with hierarchical pore structure. The unique structure of the electrodes results in excellent mechanical and electrochemical performances. The MoS2@CF electrodes exhibit superior elasticity and recoverability. After 180° bending repeatedly, the electrodes still can recover their initial sizes. Moreover, the electrodes show outstanding cycling stabilities with high reversible capacities reaching up 240 mA h g−1 after 500 cycles at 1 A g−1 (capacity retention of ~ 99%). Full-cells assembled with MoS2@CF anodes and Na3V2(PO4)3 cathodes show high reversible capacity (~ 252 mA h g−1 at 0.5 A g−1). Overall, the superior mechanical properties and high electrochemical performances indicate the promising potential of MoS2@CF electrodes in large-scale flexible sodium-ion storage devices. [Display omitted] •Superelastic and recoverable heterogeneous MoS2@CF electrodes is prepared.•Hierarchical pore structure in interconnected ultrathin MoS2 nanosheet network is achieved in MoS2@CF electrodes.•The MoS2@CF electrodes show stable electrochemical performance and high Na-storage ability.•Full-cells assembled with MoS2@CF anodes show huge potential applications in flexible energy storage devices.
ISSN:2211-2855
DOI:10.1016/j.nanoen.2018.03.060