Energy harvesting from flexible piezoelectric ring

Yeunhee Kim, Kahye Song, Jae Bok Song, Youngsu Cha

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Herein, we investigated the feasibility of a flexible ring type energy harvester for a cylindrical shape change similar to that in a bent human finger. We fabricated a ring type energy harvester using a piezoelectric material, polyvinylidene fluoride, on a polydimethylsiloxane substrate. We modeled a human finger using a silicone cylinder to mimic the movement of a real human finger and measured the power harvested from its shape change under compression. A series of experiments were conducted under two different conditions, namely the variations in the radius of the cylinder and input frequency. Furthermore, we experimentally and theoretically assessed the output power and analyzed the harvested power as a function of the load resistance. We observed that the maximum harvested power level is of the order of hundreds of nanowatts.

Original languageEnglish
Article number084007
JournalSmart Materials and Structures
Issue number8
Publication statusPublished - 2019 Jul 23

Bibliographical note

Funding Information:
This work was supported in part by Korea Institute of Science and Technology Institutional Program under grant number 2E29460.

Publisher Copyright:
© 2019 IOP Publishing Ltd.


  • Energy harvesting
  • piezoelectric material
  • ring shape

ASJC Scopus subject areas

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering


Dive into the research topics of 'Energy harvesting from flexible piezoelectric ring'. Together they form a unique fingerprint.

Cite this