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Issue 23, 2018
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3D carbon foam-supported WS2 nanosheets for cable-shaped flexible sodium ion batteries

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Abstract

Sodium ion batteries (SIBs) are proposed as alternatives to the current widely used lithium ion batteries (LIBs) due to the abundance of battery-grade sodium sources in nature. However, the search for suitable high-performance electrode materials for SIBs continues to remain a significant challenge. Herein, we report a hybrid nanoarchitecture with nitrogen-doped graphene quantum dots (NGQDs)-decorated WS2 nanosheets anchored on a porous three-dimensional carbon foam (NGQDs-WS2/3DCF) scaffold as the anode that enables long-term cycling and high rate capability for SIBs. Benefiting from the 3D robust porous interpenetrating framework and the NGQDs decoration, the NGQDs-WS2/3DCF nanoarchitecture exhibits a high rate capability with a capacity of 268.4 mA h g−1 at 2000 mA g−1, and a long lifetime with an extraordinary capacity retention of 97.1% over 1000 cycles. Furthermore, the pseudocapacitance contributions of the NGQDs-WS2/3DCF nanoarchitecture are quantified by an in-depth kinetics analysis, which provides a better understanding of the excellent electrochemical performances. Remarkably, a cable-shaped flexible full SIB was also demonstrated using NGQDs-WS2/3DCF as the anode electrode, which exhibits high capacity and excellent flexibility. The nanoarchitecture fabrication approach and the surface engineering strategy as well as the demonstrated cable-shaped configuration may open an avenue for the development of wearable SIBs with high performance.

Graphical abstract: 3D carbon foam-supported WS2 nanosheets for cable-shaped flexible sodium ion batteries

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Publication details

The article was received on 26 Mar 2018, accepted on 08 May 2018 and first published on 09 May 2018


Article type: Paper
DOI: 10.1039/C8TA02773K
Citation: J. Mater. Chem. A, 2018,6, 10813-10824
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    3D carbon foam-supported WS2 nanosheets for cable-shaped flexible sodium ion batteries

    Y. Wang, D. Kong, S. Huang, Y. Shi, M. Ding, Y. Von Lim, T. Xu, F. Chen, X. Li and H. Y. Yang, J. Mater. Chem. A, 2018, 6, 10813
    DOI: 10.1039/C8TA02773K

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