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Construction of composite electrodes comprising manganese dioxide nanoparticles distributed in polyaniline–poly(4-styrene sulfonic acid-co-maleic acid) for electrochemical supercapacitor

Authors
Journal
Journal of Power Sources
0378-7753
Publisher
Elsevier
Publication Date
Volume
191
Issue
2
Identifiers
DOI: 10.1016/j.jpowsour.2009.02.046
Keywords
  • Polyaniline
  • Poly(4-Styrene Sulfonic Acid-Co-Maleic Acid)
  • Manganese Oxide
  • Supercapacitors
  • Specific Capacitance
Disciplines
  • Chemistry

Abstract

Abstract This work demonstrated a novel and simple route for preparing a composite comprising of manganese oxide (MnO 2) nanoparticles and polyaniline (PANI) doped poly(4-styrene sulfonic acid-co-maleic acid) (PSSMA) by “electrochemical doping-deposition”. The PANI–PSSMA–MnO 2 composite was characterized by scanning electron microscopy (SEM)), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). SEM images revealed a uniform dispersion of MnO 2 nanoparticles in the porous structure of PANI–PSSMA structure. XRD measurements showed the distortion of the crystal structure of β-MnO 2 after deposition of MnO 2 in PANI–PSSMA structure. Thus, the XRD pattern of PANI was predominating. Cyclic voltammetry and chronopotentiometry were employed in 0.5 M Na 2SO 4 to evaluate the capacitor properties. The results showed a significant improvement in the specific capacitance of the composite electrode. The specific capacitance of PANI–PSSMA–MnO 2 (50.4 F g −1) had improvement values of 172% compared to that of PANI (18.5 F g −1). When only the MnO 2 mass was considered, the composite had a specific capacitance of 556 F g −1.

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