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<p>For high-performance supercapacitors, electrodes undergoing faradaic reactions with large specific surface areas and effective ions/electrons movement are significant. This study reports the In<sub>2</sub>S<sub>3</sub>/SnO<sub>2</sub> heterostructure, synthesized via a facile hydrothermal route followed by structural and morphological characterization to confirm phase purity and integrated heterostructure morphology. The coating of SnO<sub>2</sub> with the In<sub>2</sub>S<sub>3</sub> matrix increases the electrical conductivity of In<sub>2</sub>S<sub>3</sub>/SnO<sub>2</sub>. In a three-electrode configuration, the heterostructure of In<sub>2</sub>S<sub>3</sub>/SnO<sub>2</sub> delivered a high specific capacity of 265.0 mAh/g at 1 A/g. The fabricated solid-state asymmetric supercapacitor (ASC) using the heterostructure of In<sub>2</sub>S<sub>3</sub>/SnO<sub>2</sub> as active materials with a PVA/KOH gel electrolyte exhibited a wide operating voltage window of 1.6&#xa0;V and delivered a specific capacity of 90.6 mAh/g at 1 A/g. It also demonstrated excellent cycling stability, retaining 98% of its capacity after 6000 cycles, with a coulombic efficiency of 106.29%. Furthermore, it achieved a high specific energy of 80 Wh/kg while delivering a specific power of 8000 W/kg, demonstrating its strong potential for advanced energy storage applications.</p>

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Design and Development of In2S3/SnO2 Heterostructure for High-Performance Asymmetric Solid-State Supercapacitors

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • Masooma Nawaz,
  • Nayyab Zaheer Kayani,
  • Abdul Naveed,
  • Ali Haider,
  • Syed Mustansar Abbas,
  • Naseem Abbas

摘要

For high-performance supercapacitors, electrodes undergoing faradaic reactions with large specific surface areas and effective ions/electrons movement are significant. This study reports the In2S3/SnO2 heterostructure, synthesized via a facile hydrothermal route followed by structural and morphological characterization to confirm phase purity and integrated heterostructure morphology. The coating of SnO2 with the In2S3 matrix increases the electrical conductivity of In2S3/SnO2. In a three-electrode configuration, the heterostructure of In2S3/SnO2 delivered a high specific capacity of 265.0 mAh/g at 1 A/g. The fabricated solid-state asymmetric supercapacitor (ASC) using the heterostructure of In2S3/SnO2 as active materials with a PVA/KOH gel electrolyte exhibited a wide operating voltage window of 1.6 V and delivered a specific capacity of 90.6 mAh/g at 1 A/g. It also demonstrated excellent cycling stability, retaining 98% of its capacity after 6000 cycles, with a coulombic efficiency of 106.29%. Furthermore, it achieved a high specific energy of 80 Wh/kg while delivering a specific power of 8000 W/kg, demonstrating its strong potential for advanced energy storage applications.