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<p>In this study, we unveil a straightforward and economical method to synthesize spherical MXene/Cu<sub>2</sub>O nanostructures without the need for surfactants, showcasing remarkable potential as an electrode material for supercapacitors. Comprehensive physicochemical characterization via XRD, SEM, TEM, and XPS revealed the successful formation of highly crystalline, hierarchically structured microspheres. The analyses confirmed strong interfacial coupling between MXene and Cu<sub>2</sub>O phases and homogeneous elemental distribution, indicating well-integrated heterostructure formation at the nanoscale. Among the synthesized materials, the i-MXene/Cu<sub>2</sub>O (90&#xa0;min) displayed superior electrochemical performance, exhibiting an outstanding specific capacitance of 1078&#xa0;F/g at 10 mV/s and 672&#xa0;F/g at 5&#xa0;A/g in a three-electrode configuration. The enhanced charge storage behavior is attributed to the synergistic integration of electric double-layer capacitance from MXene and pseudocapacitive contributions from Cu<sub>2</sub>O. Dunn’s model analysis revealed a dominant surface-controlled mechanism, with capacitive contributions exceeding 90% at elevated scan rates, and indicating rapid charge/discharge kinetics. Two-electrode evaluations further demonstrated the device’s high energy and power densities, achieving 55.17 Wh/kg and 1600&#xa0;W/kg at 4&#xa0;A/g, respectively. These findings underscore the significant promise of time-engineered MXene/Cu<sub>2</sub>O heterostructures as high-performance electrode candidates for asymmetric supercapacitors.</p> Graphical abstract <p></p>

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Engineering MXene/Cu2O heterostructure nanospheres through time-dependent hydrothermal growth for efficient energy storage in supercapacitors

  • 期刊论文

  • 发表日期：

    2026年6月22日

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  • Asmat Ullah,
  • Hafiz Talha Hasnain Rana,
  • Attia Shahzadi,
  • Muhammad Rizwan Javed,
  • Ghulam Yasin,
  • Saman Ishfaq,
  • Kh. Abd El-Aziz,
  • Surender Kumar Sharma,
  • Hafiz T. Ali,
  • Yasir Javed,
  • Dongsheng Geng

摘要

In this study, we unveil a straightforward and economical method to synthesize spherical MXene/Cu2O nanostructures without the need for surfactants, showcasing remarkable potential as an electrode material for supercapacitors. Comprehensive physicochemical characterization via XRD, SEM, TEM, and XPS revealed the successful formation of highly crystalline, hierarchically structured microspheres. The analyses confirmed strong interfacial coupling between MXene and Cu2O phases and homogeneous elemental distribution, indicating well-integrated heterostructure formation at the nanoscale. Among the synthesized materials, the i-MXene/Cu2O (90 min) displayed superior electrochemical performance, exhibiting an outstanding specific capacitance of 1078 F/g at 10 mV/s and 672 F/g at 5 A/g in a three-electrode configuration. The enhanced charge storage behavior is attributed to the synergistic integration of electric double-layer capacitance from MXene and pseudocapacitive contributions from Cu2O. Dunn’s model analysis revealed a dominant surface-controlled mechanism, with capacitive contributions exceeding 90% at elevated scan rates, and indicating rapid charge/discharge kinetics. Two-electrode evaluations further demonstrated the device’s high energy and power densities, achieving 55.17 Wh/kg and 1600 W/kg at 4 A/g, respectively. These findings underscore the significant promise of time-engineered MXene/Cu2O heterostructures as high-performance electrode candidates for asymmetric supercapacitors.

Graphical abstract