Comparison of K0.5Na0.5NbO3 and PbZr0.52Ti0.48O3 compliant-mechanism-design energy harvesters

Piezoelectric energy harvesting from ambient vibrations offers an environmentally friendly approach to powering distributed sensors for the Internet of Things. This paper gives a direct comparison of Pb(Zr,Ti)O3 (PZT)- and (K,Na)NbO3 (KNN)-based harvesters using a compliant mechanism harvester design for resonant frequencies of 20, 40, and 70 Hz. At 70 Hz, the measured power densities for PZT- and KNN-based devices are 1139 and 31 μW/mm3, respectively, for unimorph structures on nickel foils of 25 and 50 μm in thickness. The power density ratios scale proportionally to the material energy harvesting figures of merit. Energy harvesting with the compliant mechanism design is twice as efficient when compared to harvesting with a simple cantilever beam.



Work Title Comparison of K0.5Na0.5NbO3 and PbZr0.52Ti0.48O3 compliant-mechanism-design energy harvesters
Open Access
  1. Veronika Kovacova
  2. Jung In Yang
  3. Leonard Jacques
  4. Hong Goo Yeo
  5. Valentin Lanari
  6. Christopher Rahn
  7. Susan Trolier-Mckinstry
License In Copyright (Rights Reserved)
Work Type Article
  1. Journal of Applied Physics
Publication Date March 21, 2021
Publisher Identifier (DOI)
Deposited December 08, 2021




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Work History

Version 1

  • Created
  • Added Comparison_of_K0.5Na0.5NbO3_and_PbZr0.52Ti0.48O3_Compliant-Mechanism-Design_Energy_Harvesters-APL-3.16.21.pdf
  • Added Creator Veronika Kovacova
  • Added Creator Jung In Yang
  • Added Creator Leonard Jacques
  • Added Creator Hong Goo Yeo
  • Added Creator Valentin Lanari
  • Added Creator Christopher Rahn
  • Added Creator Susan Trolier-Mckinstry
  • Published
  • Updated
  • Updated