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<p>In this study, PEDOT-Fe<sub>2</sub>O<sub>3</sub> supercapacitor electrodes were synthesized employing a single-step electrochemical deposition for compact solid-state energy storage. The electrodeposition process was carried out in an aqueous solution containing 3,4-ethylenedioxythiophene (EDOT), ammonium iron (II) sulfate hexahydrate, sodium acetate, and sodium sulfate, prepared in the desired stoichiometric ratios. The formation of the PEDOT-Fe<sub>2</sub>O<sub>3</sub> composite was confirmed through Raman spectroscopy, revealing the characteristic peaks of both components. At a low scan rate of 1 mVs<sup>−1</sup>, the material demonstrated a specific capacitance of 96.89 mF cm⁻<sup>2</sup>. This performance was influenced by the molar concentration of ammonium iron (II) sulfate hexahydrate, and it was concluded that the sample with 0.03&#xa0;M composition showed optimal electrochemical behavior with specific energy of 8.14 Wh kg<sup>−1</sup> and specific power 4.59&#xa0;kW&#xa0;kg<sup>−1</sup>. A prolonged life test was conducted with a stability of the discharge capacitance up to 2000 cycles. These results highlight the potential of PEDOT-Fe<sub>2</sub>O<sub>3</sub> composite electrodes for efficient and durable solid-state energy storage systems.</p>

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Co-electrodeposited poly (3, 4-ethylenedioxythiophene)—iron oxide electrodes for solid-state energy storage supercapacitors

  • 期刊论文

  • 发表日期：

    2026年5月27日

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  • Amr M. Obeidat,
  • Feras Alasali

摘要

In this study, PEDOT-Fe2O3 supercapacitor electrodes were synthesized employing a single-step electrochemical deposition for compact solid-state energy storage. The electrodeposition process was carried out in an aqueous solution containing 3,4-ethylenedioxythiophene (EDOT), ammonium iron (II) sulfate hexahydrate, sodium acetate, and sodium sulfate, prepared in the desired stoichiometric ratios. The formation of the PEDOT-Fe2O3 composite was confirmed through Raman spectroscopy, revealing the characteristic peaks of both components. At a low scan rate of 1 mVs−1, the material demonstrated a specific capacitance of 96.89 mF cm⁻2. This performance was influenced by the molar concentration of ammonium iron (II) sulfate hexahydrate, and it was concluded that the sample with 0.03 M composition showed optimal electrochemical behavior with specific energy of 8.14 Wh kg−1 and specific power 4.59 kW kg−1. A prolonged life test was conducted with a stability of the discharge capacitance up to 2000 cycles. These results highlight the potential of PEDOT-Fe2O3 composite electrodes for efficient and durable solid-state energy storage systems.