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<p>In this research work, the piezoelectric performance of polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) was significantly enhanced by the incorporation of copper-doped barium titanate (CBT) and graphene oxide (GO) nanofillers. A systematic study was conducted by varying the nanofiller content to 1, 2, 3, 4, and 5 wt%, followed by fabricating nanocomposite fiber mats using the electrospinning technique. This approach ensured the formation of continuous, flexible, and uniformly dispersed nanofibers, which are essential for piezoelectric applications. Multiple analytical techniques were used to characterize the developed nanofiber mats comprehensively. The electrospun nanofiber mats with varying CBT and GO concentrations were further utilized to fabricate piezoelectric nanogenerators (PENGs). These devices were subjected to electrical output testing under mechanical stimuli, specifically finger-tapping conditions, to simulate practical energy harvesting scenarios. Results showed a clear improvement in the output voltage with increasing filler content, which can be attributed to the strong interfacial interaction between the β-phase PVDF-HFP chains and the surface of the CBT and GO nanofillers. This novel nanogenerator design offers promising utility in wearable sensors, energy-harvesting systems, flexible/stretchable electronics, and self-powered devices, making it a viable candidate for the evolving field of sustainable energy and smart systems.</p>

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Graphene oxide effects on piezoelectric, thermal, and mechanical properties of PVDF-HFP/CBT nanocomposite fibers for energy harvesting applications

  • 期刊论文

  • 发表日期：

    2025年8月18日

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  • R. Gowdaman,
  • A. Deepa

摘要

In this research work, the piezoelectric performance of polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) was significantly enhanced by the incorporation of copper-doped barium titanate (CBT) and graphene oxide (GO) nanofillers. A systematic study was conducted by varying the nanofiller content to 1, 2, 3, 4, and 5 wt%, followed by fabricating nanocomposite fiber mats using the electrospinning technique. This approach ensured the formation of continuous, flexible, and uniformly dispersed nanofibers, which are essential for piezoelectric applications. Multiple analytical techniques were used to characterize the developed nanofiber mats comprehensively. The electrospun nanofiber mats with varying CBT and GO concentrations were further utilized to fabricate piezoelectric nanogenerators (PENGs). These devices were subjected to electrical output testing under mechanical stimuli, specifically finger-tapping conditions, to simulate practical energy harvesting scenarios. Results showed a clear improvement in the output voltage with increasing filler content, which can be attributed to the strong interfacial interaction between the β-phase PVDF-HFP chains and the surface of the CBT and GO nanofillers. This novel nanogenerator design offers promising utility in wearable sensors, energy-harvesting systems, flexible/stretchable electronics, and self-powered devices, making it a viable candidate for the evolving field of sustainable energy and smart systems.