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<p>In this study, graphene oxide (GO) was reduced via a hydrochloric acid (HCl) assisted thermal treatment to investigate its role in enhancing the electrochemical performance of MXene as a composite electrode for supercapacitor applications. The thermally reduced graphene oxide (TrGO) was incorporated into Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene nanosheets via self-assembly at various proportions, and their electrochemical performances were studied. The integration of TrGO was aimed at enhancing electrical conductivity, preventing restacking of MXene layers, and improving ion transport dynamics. MXene/TrGO composite electrode, containing 90 wt% MXene and 10 wt% TrGO, exhibited a superior overall electrochemical performance, achieving the highest specific capacitance of 366.5&#xa0;F g<sup>− 1</sup> at 5 mV s<sup>− 1</sup>, surpassing the 335.9&#xa0;F g<sup>− 1</sup> of 70 wt% MXene and 30 wt% TrGO composite, and 304.8&#xa0;F g<sup>− 1</sup> of pristine MXene. The electrode showed a rate capability of 71% at 100 mV s<sup>− 1</sup> and a superior cycling performance of 98.6% after 5000 charge-discharge cycles. Symmetric supercapacitor assembled using the optimized composite delivered an energy density of 8.26 Wh kg<sup>− 1</sup>, corresponding to a power density of 1100&#xa0;W kg<sup>− 1</sup>. These findings demonstrate that the HCl-assisted thermal reduction method is an effective strategy to synthesize MXene/rGO composites, offering promising potential for supercapacitor applications.</p>

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Electrochemical performance of Ti3C2Tx MXene-thermally reduced graphene oxide composite as a supercapacitor electrode

  • 期刊论文

  • 发表日期：

    2026年6月20日

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  • Kshetrimayum Dinesh Singh,
  • Boris Wareppam,
  • Subhadip Pal,
  • Sapam Bikesh,
  • L. Herojit Singh,
  • Biju Thangjam

摘要

In this study, graphene oxide (GO) was reduced via a hydrochloric acid (HCl) assisted thermal treatment to investigate its role in enhancing the electrochemical performance of MXene as a composite electrode for supercapacitor applications. The thermally reduced graphene oxide (TrGO) was incorporated into Ti3C2Tx MXene nanosheets via self-assembly at various proportions, and their electrochemical performances were studied. The integration of TrGO was aimed at enhancing electrical conductivity, preventing restacking of MXene layers, and improving ion transport dynamics. MXene/TrGO composite electrode, containing 90 wt% MXene and 10 wt% TrGO, exhibited a superior overall electrochemical performance, achieving the highest specific capacitance of 366.5 F g− 1 at 5 mV s− 1, surpassing the 335.9 F g− 1 of 70 wt% MXene and 30 wt% TrGO composite, and 304.8 F g− 1 of pristine MXene. The electrode showed a rate capability of 71% at 100 mV s− 1 and a superior cycling performance of 98.6% after 5000 charge-discharge cycles. Symmetric supercapacitor assembled using the optimized composite delivered an energy density of 8.26 Wh kg− 1, corresponding to a power density of 1100 W kg− 1. These findings demonstrate that the HCl-assisted thermal reduction method is an effective strategy to synthesize MXene/rGO composites, offering promising potential for supercapacitor applications.