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<p>Currently, the excessive use of fossil fuels for energy production is a major issue, because it pollutes the environment. Therefore, to overcome this issue the researchers are trying to find a renewable energy storage device. Supercapacitor is one of the well known renewable energy storage device, due to reliable and eco-friendly nature. In Supercapacitor, electrode plays a major role. Here, CoAl₂O₄/PANI nanohybrid electrode was successfully synthesized by hydrothermal route. The fabricate CoAl₂O₄/PANI nanohybrid electrode was comprehensively characterized via various analytics techniques like X-ray diffraction, which confirmed crystalline nature and purity of hybrid electrode. Scanning electron microscope was utilized to examine morphology of fabricated CoAl<sub>2</sub>O<sub>4</sub>/PANI nanohybrid and the images revealed uniform distribution of CoAl₂O₄ nanoparticles embedded in PANI matrix, forming porous interconnected network. Electrochemical analysis demonstrated superior capacitive behavior of CoAl₂O₄/PANI nanohybrid electrode, with specific capacitance (<i>C</i><sub>s</sub>) of 1587 F g<sup>−1</sup> at 1 A g<sup>−1</sup>, also energy density (<i>E</i><sub>d</sub>) of 32.9 Wh kg<sup>−1</sup>, and power density (<i>P</i><sub>d</sub>) of 193.7 W kg<sup>−1</sup>. Chronoamperometry confirmed stability of CoAl₂O₄/PANI nanohybrid for 40 h of continuous operation, and EIS revealed lower charge-transfer resistance. These results highlight CoAl₂O₄/PANI as highly stable and efficient electrode material for next-generation supercapacitors.</p><p></p>

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Enhancement in electrochemical and structural properties of CoAl₂O₄ via polyaniline for energy storage devices

  • 期刊论文

  • 发表日期：

    2025年10月24日

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  • Shahzadi Zainab,
  • F. F. Alharbi,
  • Muneerah Alomar,
  • Eman Alzahrani

摘要

Currently, the excessive use of fossil fuels for energy production is a major issue, because it pollutes the environment. Therefore, to overcome this issue the researchers are trying to find a renewable energy storage device. Supercapacitor is one of the well known renewable energy storage device, due to reliable and eco-friendly nature. In Supercapacitor, electrode plays a major role. Here, CoAl₂O₄/PANI nanohybrid electrode was successfully synthesized by hydrothermal route. The fabricate CoAl₂O₄/PANI nanohybrid electrode was comprehensively characterized via various analytics techniques like X-ray diffraction, which confirmed crystalline nature and purity of hybrid electrode. Scanning electron microscope was utilized to examine morphology of fabricated CoAl2O4/PANI nanohybrid and the images revealed uniform distribution of CoAl₂O₄ nanoparticles embedded in PANI matrix, forming porous interconnected network. Electrochemical analysis demonstrated superior capacitive behavior of CoAl₂O₄/PANI nanohybrid electrode, with specific capacitance (Cs) of 1587 F g−1 at 1 A g−1, also energy density (Ed) of 32.9 Wh kg−1, and power density (Pd) of 193.7 W kg−1. Chronoamperometry confirmed stability of CoAl₂O₄/PANI nanohybrid for 40 h of continuous operation, and EIS revealed lower charge-transfer resistance. These results highlight CoAl₂O₄/PANI as highly stable and efficient electrode material for next-generation supercapacitors.