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<p>Cu₂SnS₃ (CTS), a ternary chalcogenide semiconductor, has emerged as a promising candidate for energy storage applications owing to its polymorphic crystal structure, adaptable morphology, and superior optoelectronic properties. Nevertheless, its utilization in supercapacitors (SCs) remains limited, primarily due to intrinsic drawbacks such as low electrical conductivity and structural restacking, which hinder electrochemical performance. In this study, a green solvothermal synthesis approach was developed using <i>Mimosa pudica</i> leaf extract as a reducing agent to modulate the microstructure and surface characteristics of CTS. The concentration of the extract was systematically varied to investigate its influence on phase structure, morphology, and electrochemical properties. X-ray diffraction (XRD) analysis revealed marginal changes in the crystalline properties, evidenced by a slight shift toward lower 2θ angles with increasing extract concentration. Brunauer–Emmett–Teller (BET) surface area analysis demonstrated a substantial enhancement from 51.3&#xa0;m²/g in pristine CTS to 97.6&#xa0;m²/g in phytosynthesized CTS. Electrochemical testing revealed that the electrode prepared with CTS synthesized with 0.3&#xa0;g mL⁻¹ extract delivered the highest specific capacitance (Csp) of 857.6&#xa0;F g⁻¹ at 1.0&#xa0;A g⁻¹ in 1.0&#xa0;M Na₂SO₄ electrolyte, with an excellent capacitance retention of 93.8% after 5000 charge–discharge cycles—substantially outperforming the unmodified CTS (496.4&#xa0;F g⁻¹). These findings demonstrate that <i>Mimosa pudica</i>-mediated phytosynthesis effectively tailors the structural and surface properties of CTS, significantly improving its electrochemical performance. The enhanced energy storage capability underscores the potential of this sustainable synthesis route for developing high-performance, eco-friendly supercapacitor electrodes.</p> Graphical Abstract <p></p>

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Phytosynthesized Cu₂SnS₃ electrodes via Mimosa pudica extract for high-performance and sustainable supercapacitors

  • 期刊论文

  • 发表日期：

    2026年3月6日

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  • Hope. E. Nsude,
  • K. U. Nsude,
  • Bridget C.N. Obitte,
  • Adil Alshoaibi,
  • Nisrin Alnaim,
  • A. Diallo,
  • Chunyu Zhu,
  • Joshua Chidiebere Mba,
  • Onyekachi Nwakanma,
  • Fabian I. Ezema

摘要

Cu₂SnS₃ (CTS), a ternary chalcogenide semiconductor, has emerged as a promising candidate for energy storage applications owing to its polymorphic crystal structure, adaptable morphology, and superior optoelectronic properties. Nevertheless, its utilization in supercapacitors (SCs) remains limited, primarily due to intrinsic drawbacks such as low electrical conductivity and structural restacking, which hinder electrochemical performance. In this study, a green solvothermal synthesis approach was developed using Mimosa pudica leaf extract as a reducing agent to modulate the microstructure and surface characteristics of CTS. The concentration of the extract was systematically varied to investigate its influence on phase structure, morphology, and electrochemical properties. X-ray diffraction (XRD) analysis revealed marginal changes in the crystalline properties, evidenced by a slight shift toward lower 2θ angles with increasing extract concentration. Brunauer–Emmett–Teller (BET) surface area analysis demonstrated a substantial enhancement from 51.3 m²/g in pristine CTS to 97.6 m²/g in phytosynthesized CTS. Electrochemical testing revealed that the electrode prepared with CTS synthesized with 0.3 g mL⁻¹ extract delivered the highest specific capacitance (Csp) of 857.6 F g⁻¹ at 1.0 A g⁻¹ in 1.0 M Na₂SO₄ electrolyte, with an excellent capacitance retention of 93.8% after 5000 charge–discharge cycles—substantially outperforming the unmodified CTS (496.4 F g⁻¹). These findings demonstrate that Mimosa pudica-mediated phytosynthesis effectively tailors the structural and surface properties of CTS, significantly improving its electrochemical performance. The enhanced energy storage capability underscores the potential of this sustainable synthesis route for developing high-performance, eco-friendly supercapacitor electrodes.

Graphical Abstract