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To adapt to the low-velocity water flow closely related to human life, the natural energy can be efficiently harvested and used to power monitoring devices. Herein, a triboelectric soft fishtail (TE-SFT) driven by flow-induced vibration (FIV) effect is proposed based on the soft material synthesis technology. Specifically, inspired by the fishtail fin, a bluff body with the cross-section of fishtail-shaped is designed, and has a preferable vortex effect by fluid simulation. In power generation part, the triboelectric nanogenerator (TENG) is designed to act as an inertial pendulum structure by geometric method. Under the FIV effect, the TE-SFT driven by fishtail-shaped bluff body swings like a fish in the water and then brings the inertial pendulum to acquire the oscillation for harvesting energy from low-velocity water flow. The TE-SFT attains an open-circuit voltage (VOC) of 200 V to 313 V at the flow velocities of 0.24 to 0.89 m/s. Additionally, after 30 days of water immersion, the VOC of TE-SFT retains 96.81%. In demonstration, the TE-SFT is applied to power the temperature and humidity sensor through harvesting water flow energy. This work also provides a way for self-powered system based on the TENG and soft bionic fish in water environment.


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Soft-bionic-fishtail structured triboelectric nanogenerator driven by flow-induced vibration for low-velocity water flow energy harvesting

Show Author's information Sheng Zhang1,2Zhaoxu Jing1Xinxian Wang1Mingkang Zhu1,3Xin Yu1Jianyang Zhu1,3Tinghai Cheng1,2( )Hongwei Zhao5( )Zhong Lin Wang1,2,4( )
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China
School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
Institute of Robotics and Intelligent Systems, Wuhan University of Science and Technology, Wuhan 430081, China
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332-0245, USA
School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130022, China

Abstract

To adapt to the low-velocity water flow closely related to human life, the natural energy can be efficiently harvested and used to power monitoring devices. Herein, a triboelectric soft fishtail (TE-SFT) driven by flow-induced vibration (FIV) effect is proposed based on the soft material synthesis technology. Specifically, inspired by the fishtail fin, a bluff body with the cross-section of fishtail-shaped is designed, and has a preferable vortex effect by fluid simulation. In power generation part, the triboelectric nanogenerator (TENG) is designed to act as an inertial pendulum structure by geometric method. Under the FIV effect, the TE-SFT driven by fishtail-shaped bluff body swings like a fish in the water and then brings the inertial pendulum to acquire the oscillation for harvesting energy from low-velocity water flow. The TE-SFT attains an open-circuit voltage (VOC) of 200 V to 313 V at the flow velocities of 0.24 to 0.89 m/s. Additionally, after 30 days of water immersion, the VOC of TE-SFT retains 96.81%. In demonstration, the TE-SFT is applied to power the temperature and humidity sensor through harvesting water flow energy. This work also provides a way for self-powered system based on the TENG and soft bionic fish in water environment.

Keywords: energy harvesting, triboelectric nanogenerator, low-velocity water flow, flow-induced vibration, soft fishtail

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Publication history
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Acknowledgements

Publication history

Received: 10 April 2022
Revised: 26 June 2022
Accepted: 29 June 2022
Published: 06 August 2022
Issue date: January 2023

Copyright

© Tsinghua University Press 2022

Acknowledgements

The authors are grateful for the support from the National Key Research & Development Project from the Minister of Science and Technology (Nos. 2021YFA1201601 and 2021YFA1201604), and the Beijing Natural Science Foundation (No. 3222023).

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