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<p>Supercapacitors are vital in energy storage, offering high energy and power density. Ni spinel ferrite (NiFe<sub>2</sub>O<sub>4</sub>) and its composites with 5% and 10% polyaniline (PANI) were synthesized via the hydrothermal method. X-ray diffraction confirms a cubic structure with crystal sizes of 50–100&#xa0;nm. Photoluminescence analysis shows higher doping increases radiation absorption, with PANI providing additional charge attachment sites. Specific capacitance improves significantly from 1066.9&#xa0;F/g (NiFe<sub>2</sub>O<sub>4</sub>) to 1646.7&#xa0;F/g (NiFe<sub>2</sub>O<sub>4</sub>@10% PANI). A two-electrode system using activated carbon as the negative and NiFe<sub>2</sub>O<sub>4</sub>@10% PANI as the positive electrode exhibits excellent cyclic stability and charge retention, with energy and power densities of 13.5 Wh/kg and 900&#xa0;W/kg, respectively. These properties position NiFe<sub>2</sub>O<sub>4</sub>@PANI composites as promising materials for hybrid supercapacitor electrodes.</p>

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Synergistic Effect of Conducting Polymer PANI on Electrochemical Performance of Ni Ferrites for Asymmetric Supercapacitors

  • 期刊论文

  • 发表日期：

    2025年5月10日

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  • Huda A. Alburaih,
  • Mohammad Ahtisham,
  • Atiq ur Rehman,
  • Zahra Batool,
  • Rizwan Ul Hassan,
  • H. E. M. Musa Saad,
  • Naveed Ahmad Noor

摘要

Supercapacitors are vital in energy storage, offering high energy and power density. Ni spinel ferrite (NiFe2O4) and its composites with 5% and 10% polyaniline (PANI) were synthesized via the hydrothermal method. X-ray diffraction confirms a cubic structure with crystal sizes of 50–100 nm. Photoluminescence analysis shows higher doping increases radiation absorption, with PANI providing additional charge attachment sites. Specific capacitance improves significantly from 1066.9 F/g (NiFe2O4) to 1646.7 F/g (NiFe2O4@10% PANI). A two-electrode system using activated carbon as the negative and NiFe2O4@10% PANI as the positive electrode exhibits excellent cyclic stability and charge retention, with energy and power densities of 13.5 Wh/kg and 900 W/kg, respectively. These properties position NiFe2O4@PANI composites as promising materials for hybrid supercapacitor electrodes.