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The hydrokinetic energy of river current, as one of the essential and widespread renewable energies, is difficult to be harvested in low flow velocity and shallow water areas. In this work, a three-dimensional (3D) fully-enclosed triboelectric nanogenerator (FE-TENG) with bionic fish-like structure for harvesting hydrokinetic energy is reported, which is comprised of the triboelectric power-generation unit, bionic fish-like structure and connection unit. Through the bionic structure, the FE-TENG realizes zero head power generation in shallow water with low flow velocity. What’s more, the effect of external excitations and bionic structures on the electrical performance are systematically studied in this work. The FE-TENG can generate peak power density of 7 and 0.36 W/m3 respectively under the simulated swing state with frequency of 1.25 Hz and simulated river current with flow velocity of 0.81 m/s. In practical applications, due to the 3D fully-enclosed design, the FE-TENG immersed in water for 35 days demonstrates excellent immersion durability with undiminished electrical performance. Therefore, the work proposes an efficient method realizing zero head power generation, and provides a good candidate for long-term service in the river current.


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3D fully-enclosed triboelectric nanogenerator with bionic fish-like structure for harvesting hydrokinetic energy

Show Author's information Zhaoxu Jing1,2,§Jiacheng Zhang1,3,§Jianlong Wang1,2Mingkang Zhu1,3Xinxian Wang1,2Tinghai Cheng1,2,4( )Jianyang Zhu1,3( )Zhong Lin Wang1,4,5( )
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China
School of Mechatronic Engineering, Changchun University of Technology, Changchun, Jilin 130012, China
Institute of Robotics and Intelligent Systems, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China
CUSTech Institute of Technology, Wenzhou, Zhejiang 325024, China
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA

§ Zhaoxu Jing and Jiacheng Zhang contributed equally to this work.

Abstract

The hydrokinetic energy of river current, as one of the essential and widespread renewable energies, is difficult to be harvested in low flow velocity and shallow water areas. In this work, a three-dimensional (3D) fully-enclosed triboelectric nanogenerator (FE-TENG) with bionic fish-like structure for harvesting hydrokinetic energy is reported, which is comprised of the triboelectric power-generation unit, bionic fish-like structure and connection unit. Through the bionic structure, the FE-TENG realizes zero head power generation in shallow water with low flow velocity. What’s more, the effect of external excitations and bionic structures on the electrical performance are systematically studied in this work. The FE-TENG can generate peak power density of 7 and 0.36 W/m3 respectively under the simulated swing state with frequency of 1.25 Hz and simulated river current with flow velocity of 0.81 m/s. In practical applications, due to the 3D fully-enclosed design, the FE-TENG immersed in water for 35 days demonstrates excellent immersion durability with undiminished electrical performance. Therefore, the work proposes an efficient method realizing zero head power generation, and provides a good candidate for long-term service in the river current.

Keywords: triboelectric nanogenerator, hydrokinetic energy, three-dimensional (3D) fully-enclosed design, bionic fish-like structure, zero head power generation, water immersion durability

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Publication history
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Acknowledgements

Publication history

Received: 24 December 2021
Revised: 29 December 2021
Accepted: 31 December 2021
Published: 08 March 2022
Issue date: June 2022

Copyright

© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

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

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