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Electronic Materials Letters

, Volume 15, Issue 1, pp 61–69 | Cite as

Effect of Thickness Ratio in Piezoelectric/Elastic Cantilever Structure on the Piezoelectric Energy Harvesting Performance

  • Ga-Yeon Kim
  • Mahesh Peddigari
  • Kyung-Won Lim
  • Geon-Tae Hwang
  • Woon-Ha Yoon
  • HongSoo Choi
  • Jung Woo LeeEmail author
  • Jungho RyuEmail author
Original Article - Energy and Sustainability
  • 221 Downloads

Abstract

The energy harvesting by utilizing the piezoelectric effect for the conversion of oscillatory mechanical energy to useful electrical energy has been promising for self-powered devices. The output power can be controlled by designing the size and shape of the constituents of the harvester. This study demonstrates the effect of Ti plate (elastic layer) thickness on the resonant frequency, neutral axis position, vibration amplitude and energy harvesting performance of the cantilever structured piezoelectric energy harvester (PEH). Here, the each harvester had the same dimensions of piezoelectric layer and the same proof mass position at the end of the cantilever while it had the different elastic layer thicknesses (70–300 μm). The analysis revealed that the output power showed the opposite trend in vibration amplitude with varying the elastic layer thickness. Among all of the PEHs, the configuration with the largest elastic layer thickness (300 μm) exhibited a maximum output power of 48 μW at 76 Hz under 0.2 g acceleration, despite of the smallest vibration amplitude and the highest resonant frequency. The outcomes suggest that the thickness ratio of the piezoelectric and elastic layers should be optimized to realize the best harvesting performance.

Graphical Abstract

Keywords

Energy harvesting Piezoelectric effect Neutral axis Cantilever Thickness ratio 

Notes

Acknowledgements

This research was supported by the Civil & Military Technology Cooperation Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Science, ICT & Future Planning (No. 2014M3C1A9060874) and with the Creative Research Project of the National Science and Technology Council (CAP-17-04-KRISS). Works at YU was supported by the Basic Science Research Program of the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-2016R1A2B4011663). Works at PNU was supported from the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-2017M3A7B4049466 and NRF-2018R1C1B5045721).

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Copyright information

© The Korean Institute of Metals and Materials 2018

Authors and Affiliations

  1. 1.Department of Materials of Science and EngineeringPusan National UniversityBusanKorea
  2. 2.Functional Ceramics Research GroupKorea Institute of Materials Science (KIMS)ChangwonKorea
  3. 3.Department of Robotics EngineeringDGISTDaeguKorea
  4. 4.School of Materials Science and EngineeringYeungnam UniversityGyeongsanKorea

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