Flexible Piezoelectric Nanogenerators from BaTiO₃/PVDF Nanocomposite Films for Wearable Energy Harvesting

Raj Patel; Yuki Nakamura; Sophie Laurent

doi:10.55001/jams.v1i2.50

摘要

Flexible piezoelectric nanogenerators (PENGs) based on BaTiO₃ nanoparticle-reinforced poly(vinylidene fluoride) (PVDF) composite films are developed for harvesting biomechanical energy from human motion. The nanocomposite films with 20 wt% BaTiO₃ content and β-phase PVDF fraction of 82% achieve an open-circuit voltage of 68 V, short-circuit current of 12.5 μA, and peak power density of 285 μW/cm² under cyclic compressive loading at 5 Hz — representing a 4.2× improvement over pristine PVDF films. The enhanced performance originates from synergistic polarization of ferroelectric BaTiO₃ nanoparticles and strain-induced β-phase crystallization of the PVDF matrix. A wearable wristband prototype successfully powers a commercial temperature-humidity sensor and Bluetooth Low Energy transmitter from finger-tapping motions, demonstrating practical viability for self-powered wearable electronics.

作者简介

Raj Patel Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India

Raj Patel is a research fellow at Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India. Their research focuses on computational science, with over 57 publications in peer-reviewed journals.
Yuki Nakamura Research Center for Advanced Science and Technology, University of Tokyo, Tokyo 153-8904, Japan

Yuki Nakamura is an assistant professor at Research Center for Advanced Science and Technology, University of Tokyo, Tokyo 153-8904, Japan. Their research focuses on biomedical engineering, with over 31 publications in peer-reviewed journals.
Sophie Laurent Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, 1348 Louvain-la-Neuve, Belgium

Sophie Laurent is an assistant professor at Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, 1348 Louvain-la-Neuve, Belgium. Their research focuses on energy systems, with over 22 publications in peer-reviewed journals.