High Output Piezo/Triboelectric Hybrid Generator

Woo Suk Jung, Min Gyu Kang, Hi Gyu Moon, Seung Hyub Baek, Seok Jin Yoon, Zhong Lin Wang, Sang Woo Kim, Chong-Yun Kang

Research output: Contribution to journalArticle

113 Citations (Scopus)

Abstract

Recently, piezoelectric and triboelectric energy harvesting devices have been developed to convert mechanical energy into electrical energy. Especially, it is well known that triboelectric nanogenerators have a simple structure and a high output voltage. However, whereas nanostructures improve the output of triboelectric generators, its fabrication process is still complicated and unfavorable in term of the large scale and long-time durability of the device. Here, we demonstrate a hybrid generator which does not use nanostructure but generates much higher output power by a small mechanical force and integrates piezoelectric generator into triboelectric generator, derived from the simultaneous use of piezoelectric and triboelectric mechanisms in one press-and-release cycle. This hybrid generator combines high piezoelectric output current and triboelectric output voltage, which produces peak output voltage of ∼370 V, current density of ∼12 μA·cm-2, and average power density of ∼4.44 mW·cm-2. The output power successfully lit up 600 LED bulbs by the application of a 0.2 N mechanical force and it charged a 10 μF capacitor to 10 V in 25 s. Beyond energy harvesting, this work will provide new opportunities for developing a small, built-in power source in self-powered electronics such as mobile electronics.

Original languageEnglish
Article number9309
JournalScientific Reports
Volume5
DOIs
Publication statusPublished - 2015 Mar 23

ASJC Scopus subject areas

  • General

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    Jung, W. S., Kang, M. G., Moon, H. G., Baek, S. H., Yoon, S. J., Wang, Z. L., Kim, S. W., & Kang, C-Y. (2015). High Output Piezo/Triboelectric Hybrid Generator. Scientific Reports, 5, [9309]. https://doi.org/10.1038/srep09309