Graphene-Like MoS2/Graphene Composites: Cationic Surfactant-Assisted Hydrothermal Synthesis and Electrochemical Reversible Storage of Lithium

被引:332
|
作者
Huang, Guochuang [1 ]
Chen, Tao [1 ]
Chen, Weixiang [1 ]
Wang, Zhen [1 ]
Chang, Kun [1 ]
Ma, Lin [1 ]
Huang, Feihe [1 ]
Chen, Dongyun [2 ]
Lee, Jim Yang [2 ]
机构
[1] Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
[2] Natl Univ Singapore, Dept Biomol & Chem Engn, Singapore 119260, Singapore
关键词
molybdenum disulfide; graphene; composites; hydrothermal synthesis; lithium ion storage; HIGH-CAPACITY; ION BATTERIES; MOS2; NANOSHEETS; CARBON; EXFOLIATION; PERFORMANCE; NANOCOMPOSITES; NANOPARTICLES; SHEETS;
D O I
10.1002/smll.201300415
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A cationic surfactant-assisted hydrothermal route is developed for the facile synthesis of graphene-like MoS2/graphene (GL-MoS2/G) composites based on the hydrothermal reduction of Na2MoO4 and graphene oxide sheets with L-cysteine in the presence of cetyltrimethylammonium bromide (CTAB), following by annealling in N-2 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 approximate to 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 molL(-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.
引用
收藏
页码:3693 / 3703
页数:11
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