Akademik Veri Yönetim Sistemi
Journal of Materials Science, cilt.60, sa.48, ss.25481-25503, 2025 (SCI-Expanded, Scopus)
This study investigated the fabrication and piezoelectric properties of a piezoelectric nanogenerator (PENG) based on polyvinylidene fluoride (PVDF)/barium titanate (BaTiO₃: BTO, size: 90 nm, purity: 99.95%) incorporated with multi-walled carbon nanotubes (MWCNTs, outer diameter: 10 nm, inner diameter: 4.5 nm, length: 3–6 µm). In particular, five different types of electrospun mats (the pure PVDF, the PVDF/BaTiO₃, the PVDF/BaTiO₃/1wt.% MWCNT, the PVDF/BaTiO₃/2wt.% MWCNT, and the PVDF/BaTiO₃/3wt.% MWCNT) were synthesized using the electrospinning method. In addition, in order to develop a high-performance PENG in future, the effect of multi-walled carbon nanotubes (MWCNTs) on the piezoelectric properties of the PVDF-BaTiO3 matrix (i.e. open-circuit voltage, short-circuit current and maximum power performance under load) was examined. The results of the experiment show that when exposed to an impact force of 3N, the PVDF/BTO/2wt.%MWCNT with a thickness of 170 µm based PENG had an electrical power efficiency (301 nW) 1.73 times higher at a vibrational frequency of 20 Hz under a resistive load of 140.11 KΩ as compared to that of PENG based on the PVDF/BTO composite (174 nW). Flexible nanogenerators capable of sensing higher load weights can be obtained by gradually increasing the doping rate of MWCNTs in the composite structure.