title: Graphene-like MoS₂/graphene composites: cationic surfactant-assisted hydrothermal synthesis and electrochemical reversible storage of lithium.
abstract: 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 Na2 MoO4 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.
authors.affiliation: Department of Chemistry, Zhejiang University, Hangzhou 310027, PR China.
authors.forename: Guochuang
authors.initials: G
authors.lastname: Huang
authors.forename: Tao
authors.initials: T
authors.lastname: Chen
authors.forename: Weixiang
authors.initials: W
authors.lastname: Chen
authors.forename: Zhen
authors.initials: Z
authors.lastname: Wang
authors.forename: Kun
authors.initials: K
authors.lastname: Chang
authors.forename: Lin
authors.initials: L
authors.lastname: Ma
authors.forename: Feihe
authors.initials: F
authors.lastname: Huang
authors.forename: Dongyun
authors.initials: D
authors.lastname: Chen
authors.forename: Jim Yang
authors.initials: JY
authors.lastname: Lee
keywords: composites; graphene; hydrothermal synthesis; lithium ion storage; molybdenum disulfide