Morphotropic Phase Boundary-Assisted Lead-Free BaTiO₃/PDMS Composite-Based Hybrid Energy Harvester: A Portable Power Source for Wireless Power Transmission

Here, in this present work, the development of a lightweight, flexible hybrid energy harvester using a composite BaTi 0.89 Sn 0.11 O 3 (BTS)/polydimethylsiloxane (PDMS) has been proposed. A significantly enhanced output performance of hybrid energy harvester (HEH) was achieved by strategically coupling the piezoelectric effect with the triboelectric output. Thus, multiphase coexisted BTS particles as confirmed by the structural and dielectric properties, with a high value of d 33 coefficient ∼412 pC/N, were used as filler for the functional layer (PDMS) of the device. The hybrid energy harvesting device can harvest a maximum voltage of ∼358 V with an instantaneous power density of 1.08 mW/cm 2 from human finger imparting (force ∼ 100 N, frequency ∼ 4 Hz). The fabricated device harvests energy from handwriting and differentiates fine patterns of different letters by using it as a writing pad. In addition to that, a wireless system utilizing an inductor-based resonant coupling mechanism was developed for wireless power transmission. The easy processability, flexibility, high output performance, and alignment toward a power source for wireless power transmission make the fabricated HEH device a promising candidate for various applications for portable smart flexi-electronics.