Chinese Journal of Applied Chemistry ›› 2021, Vol. 38 ›› Issue (4): 439-446.DOI: 10.19894/j.issn.1000-0518.200275

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Green Controllable Synthesis of Sulfur/Graphene Aerogel and Performance of Lithium Sulfur Battery

GAO Feng1, XU Zi-Di2, GUAN Chun-Qian2, WANG Yan2, ZANG Yun-Hao1, QU Jiang-Ying1*   

  1. 1School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China
    2School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China
  • Online:2021-06-01
  • Supported by:
    Supported by the National Natural Science Foundation of China (No.51972059); the Scientific Research Foundation for Leading Scholars in Dongguan University of Technology (No.GB200902-31) and the Research Start-Up Funds of DGUT (No.GC300501-072)

Abstract: The sulfur/graphene aerogel (GM-S) with controllable sulfur content was produced by the hydrothermal method using oxide graphene (GO), H2O2 and H2S as the carbon precursor, oxidant and reductant, respectively. The sulfur content can be controlled in the range of 64%~84% mass fraction by changing the volume of 10% H2O2 solution. The GM-S with 70% of sulfur content (GM-S-70) shows an excellent Li-S battery performance. The GM-S-70 possesses the specific capacity of 1290 mA·h/g at the current density of 0.1 A/g. After 100 cycles at 1.0 A/g, the specific capacity of GM-S-70 decreases slowly from the 385 to 275 mA·h/g with the retention ratio of 71.4%, indicating a good cycling stability. This study provides a green method for the formation of GM-S through translating toxic hydrogen sulfide to sulfur without producing any contaminant during the whole process.

Key words: Sulfur/Graphene aerogel, Green method, Controllable synthesis, Li-S battery

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