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<p>A high-specific capacitance and longer cycle stability are the main requirements for a supercapacitor. This study explores the supercapacitive performance of an Fe<sub>2</sub>O<sub>3</sub> and graphene (Fe<sub>2</sub>O<sub>3</sub>@G) nanocomposite used as an electrode material for supercapacitor applications. The Fe<sub>2</sub>O<sub>3</sub>@G composite utilizes the features of layered structure of graphene and pseudocapacitive property of Fe<sub>2</sub>O<sub>3</sub> to achieve a high capacitance and capacitance retention. The Fe<sub>2</sub>O<sub>3</sub> nanoparticles are observed to be well attached over the graphene sheets. The Fe<sub>2</sub>O<sub>3</sub> nanoparticles decorated over graphene sheets exhibited specific capacitance of 345&#xa0;Fg<sup>−1</sup> at current density of 1&#xa0;Ag<sup>−1</sup>. An energy density of 47.9&#xa0;Wh&#xa0;kg<sup>−1</sup> with a power density of 2.5&#xa0;kW&#xa0;kg<sup>−1</sup> was obtained. The Fe<sub>2</sub>O<sub>3</sub>@G electrode also exhibited excellent capacitance retention of 91% after 2000 cycles.</p>

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Graphene–Fe2O3 Nanocomposite as an Efficient Electrode for High-Performance Supercapacitor

  • 期刊论文

  • 发表日期：

    2025年5月22日

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  • Rahul Kumar,
  • Ankur Soam

摘要

A high-specific capacitance and longer cycle stability are the main requirements for a supercapacitor. This study explores the supercapacitive performance of an Fe2O3 and graphene (Fe2O3@G) nanocomposite used as an electrode material for supercapacitor applications. The Fe2O3@G composite utilizes the features of layered structure of graphene and pseudocapacitive property of Fe2O3 to achieve a high capacitance and capacitance retention. The Fe2O3 nanoparticles are observed to be well attached over the graphene sheets. The Fe2O3 nanoparticles decorated over graphene sheets exhibited specific capacitance of 345 Fg−1 at current density of 1 Ag−1. An energy density of 47.9 Wh kg−1 with a power density of 2.5 kW kg−1 was obtained. The Fe2O3@G electrode also exhibited excellent capacitance retention of 91% after 2000 cycles.