Integrating EMI Shielding and Piezoelectric Energy Harvesting in PVDF Based Composite for Low Frequency Devices

High Resolution Image Download MS PowerPoint Slide The present work focuses on the development of Poly(vinylidene fluoride) (PVDF) based polymer nanocomposites (PNCs) incorporated with dual filler to enhance their dielectric, piezoelectric and electromagnetic interference (EMI) shielding performance. The composites were fabricated by integrating GdFeO 3 nanoparticles (NPs) and two-dimensional (2D) Ti 3 C 2 T x MXene into the PVDF matrix through a solution casting method. The effective generation of β-phase dominant PVDF and the uniform dispersion of nanofillers inside the matrix were validated by structural and morphological analysis. The crystallinity increased to 27.1%, while the β-phase fraction reached 76.6%, which is nearly 1.8 times that of the neat polymer, indicating the strong nucleating effect of MXene in promoting dipole alignment within the polymer matrix. The composite demonstrates a high dielectric constant of 46.4 at 100 Hz due to enhanced interfacial polarization, achieving a total energy density of 1.01 J cm –3, indicating its strong potential for energy storage applications. The dual-filler composite exhibits a maximum EMI shielding effectiveness of ∼23 dB (nearly 3-fold higher than neat PVDF), while the optimized composite-based piezoelectric nanogenerator (PENG) efficiently rectifies the generated output to power 5–7 LEDs in series, demonstrating its multifunctional EMI shielding and energy harvesting capability for low-frequency device applications.