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<p>MXene (Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>), a 2D layered material, has become a trending topic in the field of energy storage, due to its high-power density, flexibility, hydrophilic nature, and ease at which it can form composites with polymers, CNTs, metal oxides, and more. However, the layers of MXene restacks quite easily restricting the number of active sites to the flow of charges. Herein, we have synthesized tri-composite of Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>, α-Fe<sub>2</sub>O<sub>3</sub>, and polyaniline (PANI@α-Fe<sub>2</sub>O<sub>3</sub>/Ti<sub>3</sub>C<sub>2</sub>T<sub>X</sub>) via hydrothermal treatment followed by oxidative polymerization. The insertion of α-Fe<sub>2</sub>O<sub>3</sub> broadens the interlayer distance allowing easy charge/discharge of ions, further addition of PANI enhanced MXene’s energy density without altering its power density making MXene more reliable material for energy storage application. The composite exhibits a very high and notable electrochemical performance with 2689.3 Fg<sup>−1</sup> specific capacitance at a current density of 1 Ag<sup>−1</sup> compared to that of bare MXene (402 Fg<sup>−1</sup> at 1 Ag<sup>−1</sup>). The retention capacitance of 120.7% over 5000 cycles is reported making MXene a promising material in reducing the volume expansion of PANI. A symmetric supercapacitor was fabricated exhibiting a very high energy density of 75.60 Wh kg<sup>−1</sup>. This work intends to increase MXene’s performance favoring hybrid energy storage systems.</p> Graphical Abstract <p></p>

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High performance symmetric supercapacitor based on microporous PANI@α-Fe2O3/MXene hybrid nanocomposite

  • 期刊论文

  • 发表日期：

    2025年6月7日

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  • Hemalatha Krishna Naik,
  • Gowri Soman,
  • Gurumurthy Hegde,
  • Basavanakote Mahadevappa Basavaraja

摘要

MXene (Ti3C2Tx), a 2D layered material, has become a trending topic in the field of energy storage, due to its high-power density, flexibility, hydrophilic nature, and ease at which it can form composites with polymers, CNTs, metal oxides, and more. However, the layers of MXene restacks quite easily restricting the number of active sites to the flow of charges. Herein, we have synthesized tri-composite of Ti3C2Tx, α-Fe2O3, and polyaniline (PANI@α-Fe2O3/Ti3C2TX) via hydrothermal treatment followed by oxidative polymerization. The insertion of α-Fe2O3 broadens the interlayer distance allowing easy charge/discharge of ions, further addition of PANI enhanced MXene’s energy density without altering its power density making MXene more reliable material for energy storage application. The composite exhibits a very high and notable electrochemical performance with 2689.3 Fg−1 specific capacitance at a current density of 1 Ag−1 compared to that of bare MXene (402 Fg−1 at 1 Ag−1). The retention capacitance of 120.7% over 5000 cycles is reported making MXene a promising material in reducing the volume expansion of PANI. A symmetric supercapacitor was fabricated exhibiting a very high energy density of 75.60 Wh kg−1. This work intends to increase MXene’s performance favoring hybrid energy storage systems.

Graphical Abstract