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<p>A room-temperature, cost-effective and scalable approach for synthesizing cadmium selenide (CdSe) nanoballs embedded thin film have been achieved with the aid of cadmium hydroxide nanowires as template followed by ion exchange route at room temperature (300&#xa0;K). Structural, surface morphological and elemental analyses have been confirmed through XRD, FTIR, FE-SEM and XPS studies. Nanoball embedded in thin film deposited on conducting stainless steel (SS) substrate served as an active electrode material and delivered a remarkable specific capacitance of 554&#xa0;F/g (areal 831.39&#xa0;mF/cm<sup>2</sup>) at 5&#xa0;mV/s with 78.16% capacitive retention over 5000&#xa0;GCD cycles in 1.5&#xa0;M NaClO<sub>4</sub> electrolyte. A symmetric solid-state device with SS/CdSe//PVA - NaClO<sub>4</sub>//CdSe/SS configuration yields a specific capacitance of 11.2&#xa0;F/g (areal 17.14&#xa0;mF/cm<sup>2</sup>) with an energy and power densities of 0.76&#xa0;Wh/kg and 400 W/kg, respectively, maintaining 75.55% stability after 5000 cycles. Designed device is enabled to activate small toy dc fan highlighting the viability of actual real-world application for next-generation energy storage technologies.</p>

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Nanoballs of cadmium selenide embedded electrode towards symmetric configured solid-state supercapacitor

  • 期刊论文

  • 发表日期：

    2026年5月30日

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  • Vinay Soni,
  • Swapna Rout,
  • B. R. Sankapal

摘要

A room-temperature, cost-effective and scalable approach for synthesizing cadmium selenide (CdSe) nanoballs embedded thin film have been achieved with the aid of cadmium hydroxide nanowires as template followed by ion exchange route at room temperature (300 K). Structural, surface morphological and elemental analyses have been confirmed through XRD, FTIR, FE-SEM and XPS studies. Nanoball embedded in thin film deposited on conducting stainless steel (SS) substrate served as an active electrode material and delivered a remarkable specific capacitance of 554 F/g (areal 831.39 mF/cm2) at 5 mV/s with 78.16% capacitive retention over 5000 GCD cycles in 1.5 M NaClO4 electrolyte. A symmetric solid-state device with SS/CdSe//PVA - NaClO4//CdSe/SS configuration yields a specific capacitance of 11.2 F/g (areal 17.14 mF/cm2) with an energy and power densities of 0.76 Wh/kg and 400 W/kg, respectively, maintaining 75.55% stability after 5000 cycles. Designed device is enabled to activate small toy dc fan highlighting the viability of actual real-world application for next-generation energy storage technologies.