ABSTRACT The increasing global interest in sustainable, flexible, and self‐powered technologies has made piezoelectric energy harvesting from polymer‐based hybrid composites a core area of research. This work emphasizes on effect of the incorporation of exfoliated Molybdenum disulfide (MoS 2 ) to poly(vinylidene fluoride)‐co‐hexafluoropropylene/(0.5(BaZr 0.2 Ti 0.8 O 3 )‐0.5(Ba 0.7 Ca 0.3 TiO 3 )) (PVDF‐HFP/BZT‐BCT), thus making PVDF‐HFP/BZT‐BCT/MoS 2 hybrid composite films through solution casting and subsequent hot‐pressing process. Their structural, microstructural, dielectric, ferroelectric and piezoelectric properties were studied. β‐fraction of the hybrid composite films was determined to be greater than 65%. Relative permittivity of the hybrid composites increased up‐to 22.63, which is double than that of the pure PVDF‐HFP film. The piezoelectric constants and corresponding figure of merit were evaluated. Finite element simulations using COMSOL Multiphysics 6.0 were employed to predict the open‐circuit voltage ( V OC ), which showed good agreement with experimental results obtained from the fabricated piezoelectric harvester prototype. Short‐circuit current ( I SC ) and the corresponding power density ( P D ) were also experimentally evaluated, demonstrating the practical viability of the hybrid composites for being utilized in self‐powered IoT devices, such as wearable health trackers, motion sensors, and air‐quality monitors.
Lipsa et al. (Fri,) studied this question.