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Oriented SnS nanoflakes bound on S-doped N-rich carbon nanosheets with a rapid pseudocapacitive response as high-rate anodes for sodium-ion batteries

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Abstract

By virtue of abundant sodium resources and low cost, sodium-ion batteries have been considered as a promising candidate compared with the prevailing lithium-ion batteries. However, substantial volume changes and sluggish sodiation kinetics limit their practical application. Here, we designed and prepared a hybrid architecture of oriented tin(II) sulfide nanoflakes bound on S-doped N-rich carbon nanosheets (SnS/CNS) via a facile sol–gel and hydrothermal route. The functional carbon nanosheets not only strengthen the interaction with SnS, but also enhance the conductivity and pseudocapacitance of the composite. This unique SnS/CNS anode delivers a high reversible capacity of 654 mA h g−1 and excellent rate capabilities of 487 and 250.7 mA h g−1 at current densities of 1 and 20 A g−1, respectively. Further kinetic analyses reveal that the pseudocapacitive contribution accounts for fast Na+ storage at high rates.

Graphical abstract: Oriented SnS nanoflakes bound on S-doped N-rich carbon nanosheets with a rapid pseudocapacitive response as high-rate anodes for sodium-ion batteries

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Publication details

The article was received on 27 Jul 2017, accepted on 22 Aug 2017 and first published on 23 Aug 2017


Article type: Paper
DOI: 10.1039/C7TA06577A
Citation: J. Mater. Chem. A, 2017, Advance Article
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    Oriented SnS nanoflakes bound on S-doped N-rich carbon nanosheets with a rapid pseudocapacitive response as high-rate anodes for sodium-ion batteries

    J. Sheng, L. Yang, Y. Zhu, F. Li, Y. Zhang and Z. Zhou, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA06577A

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