An Ultra-Durable Windmill-Like Hybrid Nanogenerator for Steady and Efficient Harvesting of Low-Speed Wind Energy
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ARTICLE
Cite as Nano-Micro Lett. (2020) 12:175 Received: 16 May 2020 Accepted: 3 August 2020 © The Author(s) 2020
https://doi.org/10.1007/s40820-020-00513-2
An Ultra‑Durable Windmill‑Like Hybrid Nanogenerator for Steady and Efficient Harvesting of Low‑Speed Wind Energy Ying Zhang1, Qixuan Zeng1, Yan Wu1, Jun Wu1, Songlei Yuan1, Dujuan Tan1, Chenguo Hu1,2, Xue Wang1,2 * * Xue Wang, [email protected] Department of Applied Physics, State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing 400044, People’s Republic of China 2 Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, Chongqing University, Chongqing 400044, People’s Republic of China 1
HIGHLIGHTS • A novel windmill-like hybrid nanogenerator with contact-separation structure was proposed for harvesting breeze energy at low wind speed. • A spring steel sheet was creatively used both as an electrode of triboelectric nanogenerator and a booster for contact-separation activity. • A magnetic acting as a bifunctional element supplies magnetic flux variation in electromagnetic generator and overcomes electrostatic adsorption between tribolayers simultaneously.
ABSTRACT Wind energy is one of the most promising and renewable energy sources; however, owing to the limitations of device structures, col-
lecting low-speed wind energy by triboelectric nanogenerators (TENGs) is still a huge challenge. To solve this problem, an ultra-durable and highly efficient windmill-like hybrid nanogenerator (W-HNG) is developed.
Al FEP Spring steel sheet Magnets
Herein, the W-HNG composes coupled TENG and electromagnetic generator (EMG) and adopts a rotational contact-separation mode. This unique design efficiently avoids the wear of friction materials and ensures a prolonged service life. Moreover, the generator group is separated from the wind-driven part, which successfully prevents rotation resistance induced by the friction between rotor and stator in the conventional structures, and realizes low-speed wind energy harvesting. Additionally, the output characteristics of TENG can be complementary to the different performance
advantages of EMG to achieve a satisfactory power production. The device is successfully driven when the wind speed is 1.8 m s−1, and the output power of TENG and EMG can achieve 0.95 and 3.7 mW, respectively. After power management, the W-HNG has been successfully applied as a power source for electronic devices. This work provides a simple, reliable, and durable device for improved performance toward large-scale low-speed breeze energy harvesting. KEYWORDS Triboelectric nanogenerator; Windmill-like structure; Rotational contact-separation mode; Low-speed wind energy harvesting
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1 Introduction With the rapid development of the Internet of things, powering the ubiquitous and distributed sensors has become a key challenge [1–4], and converting ambient energy into available electricity is an attractive approach to sol
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