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Supercapacitive performances of few-layer MoS2 on reduced graphene oxides

  • Xuehua Song
  • Qibin ChenEmail author
  • Enhui Shen
  • Honglai Liu
Original Paper
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Abstract

Reduced graphene oxide/molybdenum disulfide composites (RGO/MoS2s) with steric structures were directly synthesized via a hydrothermal approach using a redox reaction between MoO3 and thiourea. Such RGO/MoS2s were examined by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The electrochemical performances of RGO/MoS2 hybrid electrodes were then assessed by cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectrometry (EIS) in 1 M Na2SO4 aqueous solutions. RGO/MoS2 hybrid materials exhibit a high specific capacitance of 243.4 F/g at 0.5 A/g, a superior cycling stability (92% retention after 2000 cycles at 1 A/g) and a distinctively high coulombic efficiency (near 100% after 2000 cycles) as well. Such excellent electrochemical behaviors could be ascribed to the steric structure of bending MoS2 nanosheets decorated on the surfaces of RGO, which favors facilitating the fast ion diffusion and the high conductivity in pseudocapacitive electrodes. Our findings suggested that the resulting morphologies and electrochemical performances of RGO/MoS2 hybrid materials could be tuned via varying steric structures of pseudocapacitive materials, which may render an alternative strategy to improve the electrochemical performance as supercapacitive electrodes.

Keywords

Reduced graphene oxide MoS2 Composite Supercapacitive electrode 

Notes

Funding information

This work is supported by the National Natural Science Foundation of China (Nos. 21576079 and 91334203), the 111 Project of Ministry of Education of China (No. B08021), and the Fundamental Research Funds for the Central Universities of China (No. WK 1213003).

Supplementary material

10008_2019_4195_MOESM1_ESM.docx (1.7 mb)
ESM 1 (DOCX 1731 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Xuehua Song
    • 1
  • Qibin Chen
    • 1
    Email author
  • Enhui Shen
    • 1
  • Honglai Liu
    • 1
  1. 1.State Key Laboratory of Chemical Engineering and School of Chemistry & Molecular EngineeringEast China University of Science and TechnologyShanghaiPeople’s Republic of China

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