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Abstract <p>The growing energy demands to power the burgeoning IoT devices have driven significant research into innovative and efficient energy generation methods, particularly from renewable sources. Materials with multiple stimulus responses attract attention as they can be useful in developing multifunctional devices, like energy harvesters and sensors. Herein, we have developed polymer nanocomposite films based on Polyvinylidene fluoride-tetrafluoroethylene-chlorotrifluoroethylene (PVDF-TrFE-CTFE), barium calcium zirconium titanate (Ba₀<sub>0.85</sub>Ca<sub>0.15</sub>Zr<sub>0.1</sub>Ti<sub>0.9</sub>O<sub>3</sub>, abbreviated as BCZT) and bismuth doped cobalt ferrite (CoBi<sub>0.1</sub>Fe<sub>1.9</sub>O<sub>4</sub>, abbreviated as CBFO) nanoparticles. The terpolymer PVDF-TrFE-CTFE has excellent dielectric properties and high breakdown strength compared to its polymer counterparts. Adding a ferroelectric-ferromagnetic mixed filler can enhance its dielectric, magnetic and magnetoelectric properties. The developed composite film with 5 wt% mixed filler content (PT5) showed improved dielectric (ε = 22.2) and magnetic (M<sub>s</sub> = 1.23&#xa0;emu/g) properties. The PT5 films showed an energy storage efficiency of 85.6% and can harvest energy even from subtle biomechanical movements and stray magnetic fields, opening avenues for sensing and assessing fine motor skills.</p> Graphical abstract <p></p>

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PVDF terpolymer-based multifunctional nanocomposites for energy storage and energy harvesting from fine motor movements and stray magnetic fields

  • 期刊论文

  • 发表日期：

    2026年1月22日

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  • B. C. Bhadrapriya,
  • Gara Kishor,
  • Rabindra Nath Bhowmik,
  • M. P. Sreelakshmi,
  • Maïté Fernandes Tronco,
  • C. S. Chitralekha,
  • Isabelle Royaud,
  • Didier Rouxel,
  • Nandakumar Kalarikkal

摘要

Abstract

The growing energy demands to power the burgeoning IoT devices have driven significant research into innovative and efficient energy generation methods, particularly from renewable sources. Materials with multiple stimulus responses attract attention as they can be useful in developing multifunctional devices, like energy harvesters and sensors. Herein, we have developed polymer nanocomposite films based on Polyvinylidene fluoride-tetrafluoroethylene-chlorotrifluoroethylene (PVDF-TrFE-CTFE), barium calcium zirconium titanate (Ba₀0.85Ca0.15Zr0.1Ti0.9O3, abbreviated as BCZT) and bismuth doped cobalt ferrite (CoBi0.1Fe1.9O4, abbreviated as CBFO) nanoparticles. The terpolymer PVDF-TrFE-CTFE has excellent dielectric properties and high breakdown strength compared to its polymer counterparts. Adding a ferroelectric-ferromagnetic mixed filler can enhance its dielectric, magnetic and magnetoelectric properties. The developed composite film with 5 wt% mixed filler content (PT5) showed improved dielectric (ε = 22.2) and magnetic (Ms = 1.23 emu/g) properties. The PT5 films showed an energy storage efficiency of 85.6% and can harvest energy even from subtle biomechanical movements and stray magnetic fields, opening avenues for sensing and assessing fine motor skills.

Graphical abstract