Water wave energy harvesting and self-powered liquid-surface fluctuation sensing based on bionic-jellyfish triboelectric nanogenerator |
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Authors: | Bao Dong Chen Wei Tang Chuan He Chao Ran Deng Lei Jing Yang Lai Pan Zhu Jian Chen Jia Jia Shao Long Liu Zhong Lin Wang |
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Affiliation: | 1. Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China;2. CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology (NCNST), Beijing 100190, China;3. School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA |
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Abstract: | Due to the natural working mechanism of triboelectric nanogenerators (TENGs), potential energy stored by elastic materials may not be effectively converted into electric power, post mechanical triggering. Here, we report a practical bionic-jellyfish triboelectric nanogenerator (bjTENG) with polymeric thin film as the triboelectric material, which is shape-adaptive, with a hermetic package and a unique elastic resilience structure, similar to the behavior of a jellyfish. The charge separation in the elastic resilience of this bionic-structure is based on the liquid pressure-induced contact-separation of the triboelectric layers. On the basis of the conjunction of the triboelectrification and the electrostatic induction, a sustainable and enhanced output performance of 143?V, 11.8?mA/m2 and 22.1?μC/m2 under a low frequency of 0.75?Hz and at a water depth of 60?cm is produced, which can be used to supply power for dozens of green LEDs or a temperature sensor directly. More significantly, bjTENG is believed to be a priority technology which is attributable to its highly sensitivity, portability, and suitability for continuous detection of water level and fluctuation. Furthermore, a wireless self-powered fluctuation sensor early-warning system, which provides exact and wireless monitoring of fluctuation of a liquid surface, is also successfully developed. |
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Keywords: | Corresponding author at: School of Material Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA |
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