物理化学学报 >> 2014, Vol. 30 >> Issue (10): 1963-1969.doi: 10.3866/PKU.WHXB201408043

材料物理化学 上一篇    下一篇

花瓣状微球MoS2/石墨烯复合材料的制备及其电化学性能

张传香1,2, 张晓雪3, 陶海军3   

  1. 1. 南京工程学院材料工程学院, 南京 211167;
    2. 江苏省先进结构材料与应用技术重点实验室, 南京 211167;
    3. 南京航空航天大学材料科学与技术学院, 南京 211100
  • 收稿日期:2014-05-28 修回日期:2014-07-22 发布日期:2014-09-30
  • 通讯作者: 张传香 E-mail:zhangcxnuaa@njit.edu.cn
  • 基金资助:

    国家自然科学基金（51202112，51402150），江苏省自然科学基金（BK20130737）及南京工程学院科研启动基金（YKJ201206）资助项目

Synthesis and Electrochemical Properties of MoS2/Graphene Composites with Petal-Shaped Microspheres

ZHANG Chuan-Xiang1,2, ZHANG Xiao-Xue3, TAO Hai-Jun3   

  1. 1. College of Materials Engineering, Nanjing Institute of Technology, Nanjing 211167, P. R. China;
    2. Jiangsu Key Laboratory of Advanced Sturctural Materials and Application Technolygy, Nanjing 211167, P. R. China;
    3. College of Materials Science and Technology, Nanjing University of Aeronautics & Astronautics, Nanjing 211106, P. R. China
  • Received:2014-05-28 Revised:2014-07-22 Published:2014-09-30
  • Contact: ZHANG Chuan-Xiang E-mail:zhangcxnuaa@njit.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (51202112, 51402150), Natural Science Foundation of Jiangsu Province, China(BK20130737), and Scientific Research Fund of Nanjing Institute of Technology, China (YKJ201206)

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摘要：

采用有利于二维层状结构形成的L-半胱氨酸作为硫源，钼酸钠作为钼源，制备聚乙烯基吡咯烷酮（PVP）辅助水热合成花瓣状微球形貌的MoS2/还原氧化石墨烯复合电极材料（PVP-MoS2/RGO）. X射线衍射（XRD）及透射电子显微镜（TEM）证实，经过PVP的适量添加，MoS2有序堆垛结构的片层数目明显减少. 扫描电子显微镜（SEM）显示，添加适量PVP的MoS2/石墨烯材料具有分散性更好的花瓣状微球形貌. 上述的少层有序堆垛结构及复合材料的良好分散性缩短了MoS2中锂离子的嵌入/脱出路径，使其具有更高的容量、循环稳定性和倍率性能.

关键词: 花瓣状微球, PVP-MoS2/RGO, 容量, 循环稳定性, 倍率性能

Abstract:

MoS2/graphene composites were synthesized using L-cysteine and sodium molybdate as the sources of sulfur and molybdenum, and L-cysteine was found to be beneficial for two-dimensional layered structure formation. Polyvinylpyrrolidone (PVP)-assisted hydrothermal synthesis gave petal-shaped MoS2/ reduction of graphene oxide (RGO) composite electrode materials (PVP-MoS2/RGO). X-ray diffraction and transmission electron microscopy confirmed that MoS2 changed to a less ordered layer structure from the multilayer stacking structure after moderate addition of PVP. Scanning electron microscopy showed that the moderate PVP-assisted MoS2/RGO material had a petal-shaped microsphere morphology with good dispersion. The ordered stacking structure with less layers and good dispersion of the composite materials shorten the embedded in/out path of lithium ions in MoS2, which obviously improved their capacity, cycle stability, and rate performance as lithium ion battery anode materials.

Key words: Petal shaped microsphere, PVP-MoS2/RGO, Capacity, Cycle stability, Rate performance