Citation: ZHANG Chuan-Xiang, ZHANG Xiao-Xue, TAO Hai-Jun. Synthesis and Electrochemical Properties of MoS2/Graphene Composites with Petal-Shaped Microspheres[J]. Acta Physico-Chimica Sinica, ;2014, 30(10): 1963-1969. doi: 10.3866/PKU.WHXB201408043
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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 (R ) composite electrode materials (PVP-MoS2/R ). 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/R material had a petal-shaped microsphere morphology with od dispersion. The ordered stacking structure with less layers and od 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.
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Keywords:
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Petal shaped microsphere
, - PVP-MoS2/R ,
- Capacity,
- Cycle stability,
- Rate performance
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