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<p>Manganese oxide (MnO<sub>2</sub>) has been extensively studied as promising electrode material for supercapacitors due to its high theoretical specific capacitance, eco-friendliness, and low cost. However, its practical application is limited by poor electrical conductivity and structural instability, which hinder its rate capability and long-term cycling stability. To overcome these drawbacks, the integration of conducting polymers such as polyaniline (PANI) and poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT: PSS) seems to be beneficial to enhance the conductivity, pseudocapacitive behavior, and structural integrity. In this study, a novel ternary composite was successfully developed, incorporating PANI, PEDOT: PSS and MnO<sub>2</sub> using cost effective in-situ oxidative polymerization method. This approach aimed to develop high-performance supercapacitor electrodes with enhanced electrochemical properties. Extensive material characterization was conducted to elucidate the composite’s properties: X-ray diffraction and X-ray photoelectron spectroscopy were employed to analyze crystallographic structure and elemental oxidation states, respectively. Scanning electron microscopy imaging uncovered highly porous morphology, which is efficient for ion transport and improving electrolyte accessibility. Additionally, UV-Visible spectroscopy provided insight into the electronic transitions and bandgap properties. The electrochemical analysis demonstrated particularly the superior performance of the PANI/PEDOT: PSS/MnO<sub>2</sub> 2% composite, which exhibited an efficient charge transport and effective ion diffusion kinetics, achieving a specific capacitance of 422.7&#xa0;F/g and energy density around 150.3 Wh/Kg at scan rate of 10 mV/s. The pronounced synergy among constituent materials highlights the potential of the composite for advanced energy storage applications.</p> Graphical abstract <p></p>

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Synergistic PANI/PEDOT: PSS/MnO2 composites electrode for superior supercapacitor performance

  • 期刊论文

  • 发表日期：

    2025年11月12日

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  • Lila Meziane,
  • Naima Boudieb,
  • Mohamed Loucif Seiad,
  • Imane Zaoui,
  • Imane Mechairi,
  • Amine Doumaz

摘要

Manganese oxide (MnO2) has been extensively studied as promising electrode material for supercapacitors due to its high theoretical specific capacitance, eco-friendliness, and low cost. However, its practical application is limited by poor electrical conductivity and structural instability, which hinder its rate capability and long-term cycling stability. To overcome these drawbacks, the integration of conducting polymers such as polyaniline (PANI) and poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT: PSS) seems to be beneficial to enhance the conductivity, pseudocapacitive behavior, and structural integrity. In this study, a novel ternary composite was successfully developed, incorporating PANI, PEDOT: PSS and MnO2 using cost effective in-situ oxidative polymerization method. This approach aimed to develop high-performance supercapacitor electrodes with enhanced electrochemical properties. Extensive material characterization was conducted to elucidate the composite’s properties: X-ray diffraction and X-ray photoelectron spectroscopy were employed to analyze crystallographic structure and elemental oxidation states, respectively. Scanning electron microscopy imaging uncovered highly porous morphology, which is efficient for ion transport and improving electrolyte accessibility. Additionally, UV-Visible spectroscopy provided insight into the electronic transitions and bandgap properties. The electrochemical analysis demonstrated particularly the superior performance of the PANI/PEDOT: PSS/MnO2 2% composite, which exhibited an efficient charge transport and effective ion diffusion kinetics, achieving a specific capacitance of 422.7 F/g and energy density around 150.3 Wh/Kg at scan rate of 10 mV/s. The pronounced synergy among constituent materials highlights the potential of the composite for advanced energy storage applications.

Graphical abstract