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As a typical two-dimensional transition metal dichalcogenide, molybdenum disulfide (MoS2) is considered a potential anode material for sodium-ion batteries (NIBs), due to its relatively high theoretical capacity (~ 670 mAh·g–1). However, the low electrical conductivity of MoS2 and its dramatic volume change during charge/discharge lead to severe capacity degradation and poor cycling stability. In this work, we developed a facile, scalable, and effective synthesis method to embed nanosized MoS2 into a thin film of three-dimensional (3D)-interconnected carbon nanofibers (CNFs), producing a MoS2/CNFs film. The free-standing MoS2/CNFs thin film can be used as anode for NIBs without additional binders or carbon black. The MoS2/CNFs electrode exhibits a high reversible capacity of 260 mAh·g–1, with an extremely low capacity loss of 0.05 mAh·g–1 per cycle after 2, 600 cycles at a current density of 1 A·g–1. This enhanced sodium storage performance is attributed to the synergistic effect and structural advantages achieved by embedding MoS2 in the 3D-interconnected carbon matrix.

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Publication history

Received: 26 September 2017
Revised: 14 November 2017
Accepted: 10 December 2017
Published: 02 August 2018
Issue date: July 2018

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© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2017

Acknowledgements

Acknowledgments

This work was supported by the National Key Research and Development Program of China (No. 2016YFB0100305), the National Natural Science Foundation of China (Nos. 21373195 and 51622210), the Fundamental Research Funds for the Central Universities (No. WK3430000004), and the Collaborative Innovation Center of Suzhou Nano Science and Technology.

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Reprints and Permission requests may be sought directly from editorial office.
Email: nanores@tup.tsinghua.edu.cn

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