Scholarlink

<p>Over the past few decades, piezoelectric nanogenerators (PENGs) have garnered significant attention as promising solutions for sustainable energy harvesting due to their ability to convert external mechanical forces into electrical energy. Despite considerable advancements, however, current PENG technologies remain limited in structural diversity, which restricts output enhancement and hinders their application in wearable, implantable, and microelectromechanical systems (MEMS) devices. In this study, PENGs were fabricated using the electrospinning technique with a nanocomposite system composed of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), functionalized multi-walled carbon nanotubes (f-MWCNTs), and copper-doped barium titanate (CBT) nanoparticles. The effects of these nanofillers on the structural, mechanical, dielectric, thermal, and piezoelectric properties of the composite films were systematically investigated. The incorporation of f-MWCNTs enhanced the tensile strain capacity of the nanocomposite films, indicating improved mechanical flexibility. Dielectric analysis revealed enhanced electrical conductivity and superior dielectric properties, with the nanocomposite film containing 5 wt.% nanofillers achieving a high dielectric constant of 36. Although these films exhibited a high dielectric constant with reduced flexibility, they remained suitable for energy-harvesting applications. The piezoelectric performance was evaluated under finger-tapping conditions. The PENG based on the PVDF-HFP/CBT/f-MWCNT nanocomposite with 3 wt.% nanofillers generated an output voltage of 3.72&#xa0;V, as measured using a digital oscilloscope. This output represents a substantial improvement relative to the pure PVDF-HFP film, which generated only 1.2&#xa0;V under identical conditions. Overall, the incorporation of CBT and f-MWCNT nanofillers into the PVDF-HFP matrix significantly enhanced the mechanical, dielectric, and piezoelectric performance of the nanocomposite films, demonstrating their strong potential for next-generation self-powered devices.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Synergistic Role of Copper-Doped Barium Titanate and Functionalized Carbon Nanotubes in PVDF-HFP Nanofiber Films for Flexible Piezoelectric Energy Harvesting

  • 期刊论文

  • 发表日期：

    2026年6月14日

查看全文
  • M. Satthiyaraju,
  • R. Gowdaman,
  • Durga Prasad Pabba,
  • N. Arul,
  • K. M. Govindaraju,
  • N. B. Karthik Babu,
  • C. M. Nagaraj,
  • A. S. Vivekananda,
  • C. K. Arvinda Pandian

摘要

Over the past few decades, piezoelectric nanogenerators (PENGs) have garnered significant attention as promising solutions for sustainable energy harvesting due to their ability to convert external mechanical forces into electrical energy. Despite considerable advancements, however, current PENG technologies remain limited in structural diversity, which restricts output enhancement and hinders their application in wearable, implantable, and microelectromechanical systems (MEMS) devices. In this study, PENGs were fabricated using the electrospinning technique with a nanocomposite system composed of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), functionalized multi-walled carbon nanotubes (f-MWCNTs), and copper-doped barium titanate (CBT) nanoparticles. The effects of these nanofillers on the structural, mechanical, dielectric, thermal, and piezoelectric properties of the composite films were systematically investigated. The incorporation of f-MWCNTs enhanced the tensile strain capacity of the nanocomposite films, indicating improved mechanical flexibility. Dielectric analysis revealed enhanced electrical conductivity and superior dielectric properties, with the nanocomposite film containing 5 wt.% nanofillers achieving a high dielectric constant of 36. Although these films exhibited a high dielectric constant with reduced flexibility, they remained suitable for energy-harvesting applications. The piezoelectric performance was evaluated under finger-tapping conditions. The PENG based on the PVDF-HFP/CBT/f-MWCNT nanocomposite with 3 wt.% nanofillers generated an output voltage of 3.72 V, as measured using a digital oscilloscope. This output represents a substantial improvement relative to the pure PVDF-HFP film, which generated only 1.2 V under identical conditions. Overall, the incorporation of CBT and f-MWCNT nanofillers into the PVDF-HFP matrix significantly enhanced the mechanical, dielectric, and piezoelectric performance of the nanocomposite films, demonstrating their strong potential for next-generation self-powered devices.