FABRICATION AND CHARACTERIZATION OF FLEXIBLE PIEZOELECTRIC COMPOSITE FILM KNN-Li/ZnO/PVDF FOR ENERGY HARVESTING APPLICATIONS

Abstract

Harvesting of energy has drawn a lot of interest recently as a means of generating an electrical equipment. We must develop efficient, renewable and clean energy sources to fulfill the expanding needs and energy consumption worldwide. In this field, researchers are attempting to replace sources of energy and piezoelectricity has been proposed as a potential source. Now, the piezoelectric materials become very common to produce electricity. This article aims to develop a novel source of energy using piezoelectric materials. The main focus of this article is on piezoelectric devices as a source of energy that looks into connections between multiple devices and aims to produce the most possible power. This research explores the synthesis and characterization of a flexible piezoelectric composite film comprised of potassium sodium niobate-lithium (KNN-Li), zinc oxide (ZnO), and polyvinylidene fluoride (PVDF) for efficient energy harvesting applications. The composite film was fabricated through a multi-step process involving ball milling and drop casting methods, aiming to optimize the material properties and enhance energy conversion efficiency. The ball milling technique was employed to achieve homogeneity and fine particle size distribution of KNN-Li ceramic powder was synthesized by solid state reaction method. The fabricated composite film was fabricated by drop cast method and subjected to a comprehensive characterization using various techniques. X-ray diffraction (XRD) analysis was employed to investigate the crystal structure and phase purity, ensuring the successful formation of the desired composite. Scanning electron microscopy (SEM) was utilized to scrutinized the surface morphology and the distribution of piezoelectric phases. Fourier transform infrared spectroscopy (FTIR) was employed to analyse chemical bonding and β phase. Finally, voltage measurements were conducted to assess the piezoelectric performance of the film under mechanical stress, showcasing its potential for energy harvesting applications.