Molecules (Mar 2023)

Monodisperse MoS<sub>2</sub>/Graphite Composite Anode Materials for Advanced Lithium Ion Batteries

  • Baosheng Liu,
  • Feng Li,
  • Hongda Li,
  • Shaohui Zhang,
  • Jinghua Liu,
  • Xiong He,
  • Zijun Sun,
  • Zhiqiang Yu,
  • Yujin Zhang,
  • Xiaoqi Huang,
  • Fei Guo,
  • Guofu Wang,
  • Xiaobo Jia

DOI
https://doi.org/10.3390/molecules28062775
Journal volume & issue
Vol. 28, no. 6
p. 2775

Abstract

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Traditional graphite anode material typically shows a low theoretical capacity and easy lithium decomposition. Molybdenum disulfide is one of the promising anode materials for advanced lithium-ion batteries, which possess low cost, unique two-dimensional layered structure, and high theoretical capacity. However, the low reversible capacity and the cycling-capacity retention rate induced by its poor conductivity and volume expansion during cycling blocks further application. In this paper, a collaborative control strategy of monodisperse MoS2/graphite composites was utilized and studied in detail. MoS2/graphite nanocomposites with different ratios (MoS2:graphite = 20%:80%, 40%:60%, 60%:40%, and 80%:20%) were prepared by mechanical ball-milling and low-temperature annealing. The graphite sheets were uniformly dispersed between the MoS2 sheets by the ball-milling process, which effectively reduced the agglomeration of MoS2 and simultaneously improved the electrical conductivity of the composite. It was found that the capacity of MoS2/graphite composites kept increasing along with the increasing percentage of MoS2 and possessed the highest initial discharge capacity (832.70 mAh/g) when MoS2:graphite = 80%:20%. This facile strategy is easy to implement, is low-cost, and is cosmically produced, which is suitable for the development and manufacture of advance lithium-ion batteries.

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