Enhanced energy transfer and conversion for high performance phononic crystal-assisted elastic wave energy harvesting. (December 2020)

• Record Type: Journal Article
• Authors: Lee, Tae-Gon; Jo, Soo-Ho; Seung, Hong Min; Kim, Sun-Woo; Kim, Eun-Ji; Youn, Byeng D.; Nahm, Sahn; Kim, Miso
• Is Part Of: Nano energy. Volume 78(2020)
• Publication Date: 2020-12
• Subjects: Metamaterials -- Phononic crystals -- Energy harvesting -- Piezoelectricity -- Elastic waves; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2020.105226
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: A critical challenge in energy harvesting has been insufficient sustainable power generation for practical applications, despite the benefits of self-powering and green-enabling technology. Metamaterials are artificial structures capable of controlling and manipulating functionalities beyond the limit of natural materials. Various metamaterial concepts including phononic crystals (PnCs) and locally resonant metamaterials have proved to manipulate mechanical waves and enable amplification of input mechanical wave energy, such as sound, vibration, and ultrasonic waves, thus enabling drastic enhancement of energy harvesting thus far. Along with the need for research on novel metamaterial designs for energy localization and focusing, fundamental understanding of the energy transfer and conversion at the interface between the piezoelectric energy harvesting (PEH) devices and the metamaterial host structure is also crucial to further enhancing the output power performance of metamaterial-based energy harvesting. Here, we report a substantially enhanced harvesting power amplification and output power in phononic crystal-assisted elastic wave energy harvesting by tailoring geometric and materials parameters of a PEH device for a given PnC structure. We envision that the underlying wave physics and materials science in this rational parametric design strategy will contribute to realizing self-powered sensor applications in industrial and environmental monitoring fields. Graphical abstract: Metamaterials such as phononic crystals and acoustic/elastic metamaterials provide an ideal platform to manipulate mechanical waves and enable amplification of input mechanical wave energy, such as sound, vibration, and ultrasonic waves, thus enabling drastic enhancement of energy harvesting. In this study, a rational parametric design strategy is established to produce a proper piezoelectric ceramic device that can substantially enhance the phononic crystal-assisted elastic wave energy harvesting performance. Image 1 Highlights: Fundamental understanding of the wave energy transfer and conversion between the piezoelectric devices and the phononic crystal is presented. Proper geometric parameters and materials figure-of-merit of piezoelectric energy harvesting devices for power enhancement are identified. Drastic enhancement of harvesting power of up to 2.7 mW in our phononic crystal-based system is realized via a tailored piezoelectric device.