Piezoelectric Energy Harvesting Design Principles for Materials and Structures: Material Figure-of-Merit and Self-Resonance Tuning

Hyun Cheol Song, Sun Woo Kim, Hyun Soo Kim, Dong Gyu Lee, Chong Yun Kang, Sahn Nahm

    Research output: Contribution to journalReview articlepeer-review

    110 Citations (Scopus)

    Abstract

    Piezoelectric energy harvesters (PEHs) aim to generate sufficient power to operate targeting device from the limited ambient energy. PEH includes mechanical-to-mechanical, mechanical-to-electrical, and electrical-to-electrical energy conversions, which are related to PEH structures, materials, and circuits, respectively; these should be efficient for increasing the total power. This critical review focuses on PEH structures and materials associated with the two major energy conversions to improve PEH performance. First, the resonance tuning mechanisms for PEH structures maintaining continuous resonance, regardless of a change in the vibration frequency, are presented. Based on the manual tuning technique, the electrically- and mechanically-driven self-resonance tuning (SRT) techniques are introduced in detail. The representative SRT harvesters are summarized in terms of tunability, power consumption, and net power. Second, the figure-of-merits of the piezoelectric materials for output power are summarized based on the operating conditions, and optimal piezoelectric materials are suggested. Piezoelectric materials with large kij, dij, and gij values are suitable for most PEHs, whereas those with large kij and Qm values should be used for on-resonance conditions, wherein the mechanical energy is directly supplied to the piezoelectric material. This comprehensive review provides insights for designing efficient structures and selection of proper piezoelectric materials for PEHs.

    Original languageEnglish
    Article number2002208
    JournalAdvanced Materials
    Volume32
    Issue number51
    DOIs
    Publication statusPublished - 2020 Dec 22

    Bibliographical note

    Publisher Copyright:
    © 2020 Wiley-VCH GmbH

    Keywords

    • energy harvesting
    • figure-of-merit
    • piezoelectric
    • self-resonance tuning

    ASJC Scopus subject areas

    • General Materials Science
    • Mechanics of Materials
    • Mechanical Engineering

    Fingerprint

    Dive into the research topics of 'Piezoelectric Energy Harvesting Design Principles for Materials and Structures: Material Figure-of-Merit and Self-Resonance Tuning'. Together they form a unique fingerprint.

    Cite this