• Title
    [International Journal] A nanocrystalline Co3O4 @polypyrrole/MWCNT hybrid nanocomposite for high performance electrochemical supercapacitors
  • Journal
    RSC Advances
  • Authors
    Sivalingam Ramesh, Yuvaraj Haldorai, Heung Soo Kim and Joo-Hyung Kim*
  • Date
    July, 2017
  • Citation Index
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  • 글주소
  • 10-22

RSC Adv., 2017, 7, 36833

A nanocrystalline Co3O4@polypyrrole/MWCNT">Co3O4 @polypyrrole/MWCNT hybrid nanocomposite for high performance electrochemical supercapacitors

In this study, a ternary hybrid nanocomposite of Co3O4@polypyrrole/MWCNT">Co3O4@polypyrrole/MWCNT was prepared via oxidative
polymerization of pyrrole monomer and a hybrid composite by a hydrothermal process. The synthesized
hybrid nanocomposite was characterized by Raman spectroscopy, X-ray diffraction (XRD), X-ray
photoelectron spectroscopy (XPS), scanning electron microscopy-EDX (SEM-EDX), and field emission
resolution transmission electron microscopy (FE-TEM). The results of the structural and morphological
studies of the hybrid nanocomposite show its controlled morphology and thermal stability. In addition,
the electrochemical performances of charge–discharge cycles and impedance results were evaluated by
cyclic voltammetry (CV) analysis. The as-synthesized hybrid nanocomposite was used to fabricate
a three-electrode system in the presence of an electrochemical cell with 6 M potassium hydroxide
(KOH) as electrolyte. The electrochemical performance of the hybrid composite displays good capacitive
behavior with a specific capacitance of 609 F g1 at a current density of 3 A g1, energy density 84.58
(W h kg1), power density 1500 (W kg1), and a good specific capacitance retention of ca. 97.1% after
5000 continuous charge–discharge cycles, indicating that the hybrid nanocomposite can be a promising
electroactive material for supercapacitors.