中文摘要：

借助机械球磨法,成功地利用层状硫化物Mo S2对膨胀石墨实现了有效剥离,得到石墨烯与Mo S_2的复合材料。球磨处理后,元素C均匀地分散在复合材料中。Mo S_2与膨胀石墨的质量比越高,得到的复合材料中具有石墨烯特征的石墨就越多,但相应的石墨烯的缺陷也越多。优化后的复合材料用作锂离子电池负极材料时显示出良好的电池性能,在小倍率0.1 Ah/g电流密度下充放电循环70次后,电池容量仍保持在～570 m Ah/g;在大倍率1 A/g电流密度下充放电循环55次后,电池容量仍能保持在～450 m Ah/g。

英文摘要：

To meet the high performances of lithium ion batteries, it is very important to develop novel anode materials with high electrochemical capacity to replace the current carbon based materials. Molybdenum disulfide is widely known as a potential anode material and graphene is an effective additive for achieving the electrochemical properties of Mo S2. In this study, with the aid of mechanical milling, edge-opened graphite was designed to be exfoliated into graphene by layered Mo S2 to form composite anode materials, Gr/Mo S2. This method was applicable to prepare Gr-Mo S2 composites in large scale. The composite anode samples were characterized by XRD, SEM, EDS, HRTEM, Raman spectra, electrochemical testing. The results showed that the graphite with large size disappeared and element carbon was uniformly distributed in the ball-milling treated composite. With increase of the mass ratio of Mo S2 to edge-opened graphite, the content of graphene in the obtained composite increased, but with more defects existed in the structure. The optimized Gr-Mo S2 composites displayed good charge/discharge character and the capacity still maintained at 450 m Ah/g after 55 charge/discharge cycles at a current density of 1 A/g.