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Journal of Materials Science: Materials in Electronics

, Volume 29, Issue 17, pp 14813–14826 | Cite as

Free-standing and binder-free electrochemical capacitor electrode based on hierarchical microfibrous carbon–graphene–Mn3O4 nanocomposites materials

  • Zineb Nabti
  • Tarik Bordjiba
  • Sujittra Poorahong
  • Amel Boudjemaa
  • Ali Benayahoum
  • Mohamed Siaj
  • Khaldoun Bachari
Article
  • 127 Downloads

Abstract

Hierarchical microfibers carbon–graphene–Mn3O4 (MFC–G–Mn3O4) nanocomposites have been successfully prepared via a simple, effective, and scalable chemical deposition method. It was applied as a free-standing and binder-free electrodes for an electrochemical capacitor. The graphene was first synthesized by electrochemical exfoliation of graphite rods and deposited on the microfibers carbon using gradually drop of the temperature until 150 °C to form MFC–G electrode. Then the Mn3O4 was prepared by direct redox depositions on MFC–G substrate at the temperature of 150 °C to form MFC–G–Mn3O4. For comparison purposes, the Mn3O4 was deposited directly on MFC to form MFC–Mn3O4 electrode under similar conditions. The synthesized materials were characterized by using scanning electronic microscopy, X-ray diffraction, Raman spectroscopy, cyclic voltammetry, galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy techniques. The results from different characterization techniques indicate that the graphene and Mn3O4 were successfully synthesized and deposited on substrates. The specific capacitance of the electrode MFC–G–Mn3O4 reached 414 F g−1, this is five times greater than that obtained capacitance from the electrode MFC–Mn3O4 which is 83 F g−1. In addition, the introduction of graphene in the matrix of Mn3O4 allows an improvement of contact resistance between the active material and the current collector, electronic conductivity of the electrode, and stability over GCD cycling. The specific capacitance of the MFC–G–Mn3O4 is one of the highest values recorded in the literature of Mn3O4 based materials. Combination of the graphene and Mn3O4 using the direct deposition resulted in efficient synergetic effect between the two materials. The facile synthesis techniques and the good capacitive performances indicate that the developed nanocomposite electrode would be promising as electrode materials for the high-performance electrochemical capacitor.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Zineb Nabti
    • 1
    • 2
  • Tarik Bordjiba
    • 1
    • 2
  • Sujittra Poorahong
    • 3
  • Amel Boudjemaa
    • 4
  • Ali Benayahoum
    • 4
  • Mohamed Siaj
    • 3
  • Khaldoun Bachari
    • 4
  1. 1.Laboratoire de Génie Electrique de Guelma (LGEG)Université 8 Mai 1945 GuelmaGuelmaAlgeria
  2. 2.Department of Process EngineeringUniversité 8 Mai 1945 GuelmaGuelmaAlgeria
  3. 3.Department of ChemistryUniversité du Québec à Montréal (UQAM)MontréalCanada
  4. 4.Center of Scientific and Technical Research in Physicochemical Analyzes (CRAPC)TipazaAlgeria

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