Powerful curved piezoelectric generator for wearable applications

Woo Suk Jung, Min Jae Lee, Min Gyu Kang, Hi Gyu Moon, Seok Jin Yoon, Seung Hyub Baek, Chong-Yun Kang

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

With the widespread use of wearable electronics, the flexible piezoelectric energy harvesting devices have been extensively studied to efficiently convert the physical motion of the human body into electrical energy. The major obstacles for realizing a flexible piezoelectric generator include the insufficient output power generation and the poor efficiency at the low-frequency regime. Here, we demonstrate a curved piezoelectric generator favorable for wearable applications, generating a high output power. The curved structure plays a key role to improve the power generation, by effectively distributing the applied force across the piezoelectric layer, as well as to allow operation at the low frequency vibration range. Accordingly, this generator produces ~120. V of peak output voltage and ~700. μA of peak output current during a cycle. Furthermore, our generator can operate at low frequencies below 50. Hz, generating ~55. V of output voltage and 250. μA of output current at 35. Hz, and it even works at frequencies as low as 1. Hz. With this generator, we successfully lit up 476 commercial LED bulbs. In addition, we experimentally demonstrate the possibility that the generator can be used in shoes, watches, and clothes as a power source. Our results will provide a framework to enhance the output power of conventional piezoelectric generators, and open a new avenue for realization of self-powered systems, such as wearable electronic devices.

Original languageEnglish
Pages (from-to)174-181
Number of pages8
JournalNano Energy
Volume13
DOIs
Publication statusPublished - 2015 Apr 1

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Power generation
Energy harvesting
Watches
Electric potential
Light emitting diodes
Wearable technology

Keywords

  • Energy harvester
  • Piezoelectric
  • Wearable

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

Cite this

Jung, W. S., Lee, M. J., Kang, M. G., Moon, H. G., Yoon, S. J., Baek, S. H., & Kang, C-Y. (2015). Powerful curved piezoelectric generator for wearable applications. Nano Energy, 13, 174-181. https://doi.org/10.1016/j.nanoen.2015.01.051

Powerful curved piezoelectric generator for wearable applications. / Jung, Woo Suk; Lee, Min Jae; Kang, Min Gyu; Moon, Hi Gyu; Yoon, Seok Jin; Baek, Seung Hyub; Kang, Chong-Yun.

In: Nano Energy, Vol. 13, 01.04.2015, p. 174-181.

Research output: Contribution to journalArticle

Jung, WS, Lee, MJ, Kang, MG, Moon, HG, Yoon, SJ, Baek, SH & Kang, C-Y 2015, 'Powerful curved piezoelectric generator for wearable applications', Nano Energy, vol. 13, pp. 174-181. https://doi.org/10.1016/j.nanoen.2015.01.051
Jung WS, Lee MJ, Kang MG, Moon HG, Yoon SJ, Baek SH et al. Powerful curved piezoelectric generator for wearable applications. Nano Energy. 2015 Apr 1;13:174-181. https://doi.org/10.1016/j.nanoen.2015.01.051
Jung, Woo Suk ; Lee, Min Jae ; Kang, Min Gyu ; Moon, Hi Gyu ; Yoon, Seok Jin ; Baek, Seung Hyub ; Kang, Chong-Yun. / Powerful curved piezoelectric generator for wearable applications. In: Nano Energy. 2015 ; Vol. 13. pp. 174-181.
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