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<p>In this study, a series of composite solid polymer electrolyte (CPE) films was synthesized by employing poly(vinylidene fluoride-co-hexa-fluoropropylene) (PVdF-HFP), sodium bis(trifluoromethane sulfonyl)imide (NaTFSI), ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethyl sulfonyl) imide [PYr<sub>14</sub>] [TFSI], and SiO<sub>2</sub> nanoparticles using the solution cast technique. The SiO<sub>2</sub> nanoparticles have been prepared using Stöber’s method and post-synthesis functionalized with thiol groups using (3-mercapto-propyl) trimethoxysilane (MPTMS), respectively. The attachment of the thiol group on SiO<sub>2</sub> has been confirmed by XRD and FTIR studies. The optimized film having 3.5&#xa0;wt% SiO<sub>2</sub> has been characterized via various techniques. It is found to have maximum ionic conductivity of ~ 0.84&#xa0;mS/cm at RT and is thermally stable up to 370&#xa0;°C. The addition of SiO<sub>2</sub> improves the mechanical properties of the electrolyte films. The optimized film exhibits a large working potential window of ~ 5.9&#xa0;V. In this work, porous activated carbon (AC) has been synthesized from bio-derived Gond Katira obtained from the <i>Astragalus gummifer</i> shrubs using an activating agent (KOH). The synthesized AC shows porous nature and high specific surface area (870.62&#xa0;m<sup>2</sup>g<sup>−1</sup>). Using the optimized CPE film and AC, an electric double-layer capacitor (EDLC) has been fabricated. The EDLC characteristics have been obtained using cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) techniques. The fabricated EDLC shows a maximum specific capacitance of ~ 165&#xa0;Fg<sup>−1</sup> with an efficiency of ~ 97%.</p> Graphical Abstract <p></p>

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Development of polymer composite films dispersed with functionalized SiO2 for application in energy devices

  • 期刊论文

  • 发表日期：

    2025年12月29日

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  • Pratibha Yadav,
  • Shilpa Khurana,
  • Amita Chandra

摘要

In this study, a series of composite solid polymer electrolyte (CPE) films was synthesized by employing poly(vinylidene fluoride-co-hexa-fluoropropylene) (PVdF-HFP), sodium bis(trifluoromethane sulfonyl)imide (NaTFSI), ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethyl sulfonyl) imide [PYr14] [TFSI], and SiO2 nanoparticles using the solution cast technique. The SiO2 nanoparticles have been prepared using Stöber’s method and post-synthesis functionalized with thiol groups using (3-mercapto-propyl) trimethoxysilane (MPTMS), respectively. The attachment of the thiol group on SiO2 has been confirmed by XRD and FTIR studies. The optimized film having 3.5 wt% SiO2 has been characterized via various techniques. It is found to have maximum ionic conductivity of ~ 0.84 mS/cm at RT and is thermally stable up to 370 °C. The addition of SiO2 improves the mechanical properties of the electrolyte films. The optimized film exhibits a large working potential window of ~ 5.9 V. In this work, porous activated carbon (AC) has been synthesized from bio-derived Gond Katira obtained from the Astragalus gummifer shrubs using an activating agent (KOH). The synthesized AC shows porous nature and high specific surface area (870.62 m2g−1). Using the optimized CPE film and AC, an electric double-layer capacitor (EDLC) has been fabricated. The EDLC characteristics have been obtained using cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) techniques. The fabricated EDLC shows a maximum specific capacitance of ~ 165 Fg−1 with an efficiency of ~ 97%.

Graphical Abstract