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β-phase-enriched PVDF@SWCNTs and α-Al2O3 nanofibers for high-performance piezo-triboelectric nanogenerator devices.

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Title: β-phase-enriched PVDF@SWCNTs and α-Al2O3 nanofibers for high-performance piezo-triboelectric nanogenerator devices.
Authors: Mousa, Hamouda M.1,2 (AUTHOR) hmousa@eng.svu.edu.eg, Dardeer, Mahmoud3 (AUTHOR), Elsheikh, Ahmed1 (AUTHOR), Mohamed, Ibrahim M. A.4 (AUTHOR), Taha, Mohamed5 (AUTHOR)
Source: Journal of Materials Science: Materials in Electronics. Nov2025, Vol. 36 Issue 31, p1-10. 10p.
Subjects: Nanogenerators, Energy harvesting, Flexible electronics, Nanofibers, Single walled carbon nanotubes, Polyvinylidene fluoride, Clean energy, Nanostructured materials
Abstract: Triboelectric nanogenerators (TENGs) are innovative energy generation devices that represent a promising pathway toward sustainable, flexible, and decentralized energy generation. In this study, a hybrid piezo-triboelectric nanogenerator (PTENG) is designed to harvest energy more efficiently by combining two mechanisms: piezoelectric and triboelectric effects. The device features a piezoelectric layer made from β-phase PVDF mixed with single-walled carbon nanotubes (SWCNTs) and a triboelectric layer made from α-Al2O3 nanofibers. The triboelectric part works in a simple contact–separation mode. Material properties were examined using transmission electron microscopy (TEM), Field emission scanning electron microscope (FESEM), and zeta potential analysis. These analyses confirmed the successful formation of crystalline nanofibers with nanoscale dimensions, while zeta potential analysis verified favorable surface charge properties for triboelectric interactions. The elemental composition of the resulting composite nanofiber indicates that the elemental weight and atomic percent are mainly attributed to carbon (C) and oxygen (O) with 47.61% and 40.9%, respectively. In addition, the presence of aluminum (Al 8.25% and Cl 3.24%) works as a metal salt (AlCl3). The assembled PTENG operates in a simple contact separation mode and demonstrates robust electrical output under hand pressing, delivering an open circuit voltage of 4 V and a current of 1000 nA. Furthermore, the device exhibited stable performance over 1600 pressing cycles, which could confirm its durability for repeated operation. The synergistic effect of the piezoelectric dipole alignment in PVDF@SWCNTs and the positive triboelectric polarity of Al2O3 nanofibers enhanced the overall energy harvesting capability. Owing to its lightweight, flexible, and cost-effective design, the developed PTENG shows strong potential for powering portable and wearable electronics, biomedical sensors, and Internet of Things (IoT) devices, which could offer a sustainable alternative to conventional micro-power sources. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Triboelectric nanogenerators (TENGs) are innovative energy generation devices that represent a promising pathway toward sustainable, flexible, and decentralized energy generation. In this study, a hybrid piezo-triboelectric nanogenerator (PTENG) is designed to harvest energy more efficiently by combining two mechanisms: piezoelectric and triboelectric effects. The device features a piezoelectric layer made from β-phase PVDF mixed with single-walled carbon nanotubes (SWCNTs) and a triboelectric layer made from α-Al2O3 nanofibers. The triboelectric part works in a simple contact–separation mode. Material properties were examined using transmission electron microscopy (TEM), Field emission scanning electron microscope (FESEM), and zeta potential analysis. These analyses confirmed the successful formation of crystalline nanofibers with nanoscale dimensions, while zeta potential analysis verified favorable surface charge properties for triboelectric interactions. The elemental composition of the resulting composite nanofiber indicates that the elemental weight and atomic percent are mainly attributed to carbon (C) and oxygen (O) with 47.61% and 40.9%, respectively. In addition, the presence of aluminum (Al 8.25% and Cl 3.24%) works as a metal salt (AlCl3). The assembled PTENG operates in a simple contact separation mode and demonstrates robust electrical output under hand pressing, delivering an open circuit voltage of 4 V and a current of 1000 nA. Furthermore, the device exhibited stable performance over 1600 pressing cycles, which could confirm its durability for repeated operation. The synergistic effect of the piezoelectric dipole alignment in PVDF@SWCNTs and the positive triboelectric polarity of Al2O3 nanofibers enhanced the overall energy harvesting capability. Owing to its lightweight, flexible, and cost-effective design, the developed PTENG shows strong potential for powering portable and wearable electronics, biomedical sensors, and Internet of Things (IoT) devices, which could offer a sustainable alternative to conventional micro-power sources. [ABSTRACT FROM AUTHOR]
ISSN:09574522
DOI:10.1007/s10854-025-15969-4