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<p>Present investigation emphasizes first report on electron beam–evaporated polycrystalline ZnSe thin film towards electrochemical supercapacitive energy storage application. Cubic crystal phase with a preferred orientation along (1&#xa0;1&#xa0;1) direction is established along with characteristic remarks at 206 and 252&#xa0;cm<sup>−1</sup> originated by an excitation wavelength of 532&#xa0;nm supported by Raman measurements and 2.65&#xa0;eV as bandgap by using UV–visible spectroscopy. Uniform grains with average size of ~ 120&#xa0;nm is established through FE-SEM studies. At 10&#xa0;mV/s, electrochemical investigation of ZnSe electrode unveils 34.82 F/g (9.0 mF/cm<sup>2</sup>) specific capacitance with the voltage window of 0.05 to − 0.75&#xa0;V in 0.5 M&#xa0;NaCl aqueous electrolyte with 95.49% cyclic stability at 1500 CV cycles. Diffusion-controlled mechanism and surface capacitive processes reveal diffusive enriched pseudocapacitive nature with 96.02% of charge storage.</p>

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Diffusive enriched electron beam evaporated ZnSe thin film: electrochemical supercapacitive energy storage application

  • 期刊论文

  • 发表日期：

    2025年5月29日

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  • Mayank Tiwari,
  • Deepak Jangir,
  • T. Kedara Shivasharma,
  • G. Hema Chandra,
  • Babasaheb R. Sankapal

摘要

Present investigation emphasizes first report on electron beam–evaporated polycrystalline ZnSe thin film towards electrochemical supercapacitive energy storage application. Cubic crystal phase with a preferred orientation along (1 1 1) direction is established along with characteristic remarks at 206 and 252 cm−1 originated by an excitation wavelength of 532 nm supported by Raman measurements and 2.65 eV as bandgap by using UV–visible spectroscopy. Uniform grains with average size of ~ 120 nm is established through FE-SEM studies. At 10 mV/s, electrochemical investigation of ZnSe electrode unveils 34.82 F/g (9.0 mF/cm2) specific capacitance with the voltage window of 0.05 to − 0.75 V in 0.5 M NaCl aqueous electrolyte with 95.49% cyclic stability at 1500 CV cycles. Diffusion-controlled mechanism and surface capacitive processes reveal diffusive enriched pseudocapacitive nature with 96.02% of charge storage.