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<p>Novel ZnS@Zeolitic imidazolate framework-67 (ZIF-67) nanocomposites have been synthesized by an <i>in-situ</i> chemical method , and their electrochemical properties have been evaluated. The synthesized ZnS@ZIF-67 has a surface area of 545&#xa0;m²/g with a pore size of 3&#xa0;nm. The electrode exhibits excellent cyclic stability, maintaining 89.28% up to 10,000 cycles, with a specific capacitance of 1135.4&#xa0;F g⁻¹ at 1&#xa0;A g⁻¹. The ZnS@ZIF-67 electrode delivers a diffusion contribution of 15.32% and a surface contribution of 84.67%. Additionally, an asymmetric supercapacitor (ASC) device that was constructed with ZnS@ZIF-67 (positive electrode) showed a energy density of 19.04 Wh kg⁻¹ with high power density of 2502.6&#xa0;W kg⁻¹. Based on the observed electrochemical results, the synthesized ZnS@ZIF-67 nanohybrids are a potential material for energy efficiency applications in sustainable and clean energy systems.</p>

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In-situ encapsulation of Porous ZnS/Zeolitic Imidazolate Framework-67 nanocomposites for Asymmetric Supercapacitor Device Application

  • 期刊论文

  • 发表日期：

    2026年7月27日

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  • Kittusamy Sathishkumar,
  • Vadivel Siva,
  • Krishnasamy Padmavathi,
  • Anbazhagan Murugan,
  • Abdul Samad Shameem

摘要

Novel ZnS@Zeolitic imidazolate framework-67 (ZIF-67) nanocomposites have been synthesized by an in-situ chemical method , and their electrochemical properties have been evaluated. The synthesized ZnS@ZIF-67 has a surface area of 545 m²/g with a pore size of 3 nm. The electrode exhibits excellent cyclic stability, maintaining 89.28% up to 10,000 cycles, with a specific capacitance of 1135.4 F g⁻¹ at 1 A g⁻¹. The ZnS@ZIF-67 electrode delivers a diffusion contribution of 15.32% and a surface contribution of 84.67%. Additionally, an asymmetric supercapacitor (ASC) device that was constructed with ZnS@ZIF-67 (positive electrode) showed a energy density of 19.04 Wh kg⁻¹ with high power density of 2502.6 W kg⁻¹. Based on the observed electrochemical results, the synthesized ZnS@ZIF-67 nanohybrids are a potential material for energy efficiency applications in sustainable and clean energy systems.