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https://doi.org/10.1002/smll.201300415
Title: | Graphene-like MoS2/graphene composites: Cationic surfactant-assisted hydrothermal synthesis and electrochemical reversible storage of lithium |
Authors: | Huang, G. Chen, T. Chen, W. Wang, Z. Chang, K. Ma, L. Huang, F. Chen, D. Lee, J.Y. |
Keywords: | composites graphene hydrothermal synthesis lithium ion storage molybdenum disulfide |
Issue Date: | 11-Nov-2013 |
Source: | Huang, G., Chen, T., Chen, W., Wang, Z., Chang, K., Ma, L., Huang, F., Chen, D., Lee, J.Y. (2013-11-11). Graphene-like MoS2/graphene composites: Cationic surfactant-assisted hydrothermal synthesis and electrochemical reversible storage of lithium. Small 9 (21) : 3693-3703. ScholarBank@NUS Repository. https://doi.org/10.1002/smll.201300415 |
Abstract: | A cationic surfactant-assisted hydrothermal route is developed for the facile synthesis of graphene-like MoS2/graphene (GL-MoS 2/G) composites based on the hydrothermal reduction of Na 2MoO4 and graphene oxide sheets with L-cysteine in the presence of cetyltrimethylammonium bromide (CTAB), following by annealling in N2 atmosphere. The GL-MoS2/G composites are characterized by X-ray diffraction, electron microscopy, high-resolution transmission electron microscopy, and Raman spectroscopy. The effects of CTAB concentration on the microstructures and electrochemical performances of the composites for reversible Li+ storage are investigated. It is found that the layer number of MoS2 sheets decreases with increasing CTAB concentration. The GL-MoS2 sheets in the composites are few-layer in the case of 0.01∼0.03 mol L-1 CTAB of hydrothermal solution and single-layer in the case of 0.05 mol L-1 CTAB. The GL-MoS2/G composites prepared with 0.01-0.02 mol·L-1 of CTAB solution exhibit a higher reversible capacity of 940-1020 mAh g-1, a greater cycle stability, and a higher rate capability than other samples. The exceptional electrochemical performance of GL-MoS2/G composites for reversible Li+ storage could be attributed to an effective integration of GL-MoS2 sheets and graphene that maximizes the synergistic interaction between them. Graphene-like (GL-) MoS2/graphene composites are prepared by a cetyltrimethylammonium bromide (CTAB)-assisted hydrothermal process and following heat treatment. In the case of 0.01-0.02 mol L-1 CTAB, the GL-MoS2 in the composites displays a few-layer structure with an interlayer spacing of 0.63-0.64 nm and the composites exhibit a high capacity of 940-1020 mAh g-1 with excellent cycle stability and high-rate capability for electrochemically reversible Li+ storage. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
Source Title: | Small |
URI: | http://scholarbank.nus.edu.sg/handle/10635/89036 |
ISSN: | 16136810 |
DOI: | 10.1002/smll.201300415 |
Appears in Collections: | Staff Publications |
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