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

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113 Citations (Scopus)


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
Publication statusPublished - 2015 Mar 23

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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