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

  • Original Article - Energy and Sustainability
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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.

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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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Author notes

  1. Ga-Yeon Kim and Mahesh Peddigari have contributed equally to this work.

Authors and Affiliations

  1. Department of Materials of Science and Engineering, Pusan National University, Busan, 46241, Korea

    Ga-Yeon Kim & Jung Woo Lee

  2. Functional Ceramics Research Group, Korea Institute of Materials Science (KIMS), Changwon, 51508, Korea

    Ga-Yeon Kim, Mahesh Peddigari, Kyung-Won Lim, Geon-Tae Hwang & Woon-Ha Yoon

  3. Department of Robotics Engineering, DGIST, Daegu, 42988, Korea

    HongSoo Choi

  4. School of Materials Science and Engineering, Yeungnam University, Gyeongsan, 38541, Korea

    Jungho Ryu

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  1. Ga-Yeon Kim
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  2. Mahesh Peddigari
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  3. Kyung-Won Lim
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  7. Jung Woo Lee
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Correspondence to Jung Woo Lee or Jungho Ryu.

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Kim, GY., Peddigari, M., Lim, KW. et al. Effect of Thickness Ratio in Piezoelectric/Elastic Cantilever Structure on the Piezoelectric Energy Harvesting Performance. Electron. Mater. Lett. 15, 61–69 (2019). https://doi.org/10.1007/s13391-018-00103-w

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  • DOI: https://doi.org/10.1007/s13391-018-00103-w

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