Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (10): 1963-1969.doi: 10.3866/PKU.WHXB201408043

• PHYSICAL CHEMISTRY OF MATERIALS • Previous Articles     Next Articles

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)

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

MSC2000: 

  • O646