Graphene‐Like MoS2/Graphene Composites: Cationic Surfactant‐Assisted Hydrothermal Synthesis and Electrochemical Reversible Storage of Lithium. Issue 21 (14th June 2013)

• Record Type: Journal Article
• Authors: Huang, Guochuang; Chen, Tao; Chen, Weixiang; Wang, Zhen; Chang, Kun; Ma, Lin; Huang, Feihe; Chen, Dongyun; Lee, Jim Yang
• Is Part Of: Small. Volume 9:Issue 21(2013:Nov.)
• Page Start: 3693
• Page End: 3703
• Publication Date: 2013-06-14
• Subjects: Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201300415
• Languages: English
• ISSNs: 1613-6810

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A cationic surfactant‐assisted hydrothermal route is developed for the facile synthesis of graphene‐like MoS<sub>2</sub>/graphene (GL‐MoS<sub>2</sub>/G) composites based on the hydrothermal reduction of Na<sub>2</sub>MoO<sub>4</sub> and graphene oxide sheets with L‐cysteine in the presence of cetyltrimethylammonium bromide (CTAB), following by annealling in N<sub>2</sub> atmosphere. The GL‐MoS<sub>2</sub>/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<sup>+</sup> storage are investigated. It is found that the layer number of MoS<sub>2</sub> sheets decreases with increasing CTAB concentration. The GL‐MoS<sub>2</sub> sheets in the composites are few‐layer in the case of 0.01∼0.03 mol L<sup>−1</sup> CTAB of hydrothermal solution and single‐layer in the case of 0.05 mol L<sup>−1</sup> CTAB. The GL‐MoS<sub>2</sub>/G composites prepared with 0.01–0.02 mol·L<sup>−1</sup> of CTAB solution exhibit a higher reversible capacity of 940–1020 mAh g<sup>−1</sup>, a greater cycle stability, and a higher rate capability than other samples. The exceptional electrochemical performance of GL‐MoS<sub>2</sub>/G composites for reversible Li<sup>+</sup> storage could be attributed to an effective integration of GL‐MoS<sub>2</sub> sheets and graphene that maximizes the synergistic interaction between them.</p> </abstract>