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Research Article

Quick evaluation and regulation of the maximum instantaneous power and matching resistance for droplet-based electricity generators

Zhifeng Hu1,2, Huamei Zhong1,2, He Shan1,2, Ruzhu Wang1,2( )
Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China
Engineering Research Center of Solar Power and Refrigeration, Ministry of Education (MOE), Shanghai 200240, China
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Graphical Abstract

Based on the working mechanism of droplet-based electricity generators (DEGs), the quick evaluation method and regulation strategy for the maximum instantaneous power and matching resistance are proposed, which powerfully promotes the evolution of DEGs for harvesting water droplet energy.

Abstract

Droplet-based electricity generators (DEGs) leveraging triboelectric effects are simple and high-performance devices for harvesting energy from ubiquitous water droplets. Instantaneous power plays a vital role in wide applications of DEGs. However, the governing law of the maximum instantaneous power and matching resistance is lacking and their determination suffers from heavy repetitive experiments, hindering the development of DEGs. Herein, we propose a quick evaluation method for the internal droplet impedance, instantaneous peak power, maximum instantaneous power and matching resistance which exhibits broad universality and excellent accuracy. Moreover, effects of diverse factors pertaining to droplets and devices are fully investigated, highlighting that the maximum instantaneous power and matching resistance can be effectively regulated across multiple orders of magnitudes by controlling the salt concentration. Our findings shed insights into the understanding, evaluation, and regulation of instantaneous power for DEGs, and shall promote the renovation of the DEG technology.

Keywords

droplet-based electricity generatormaximum instantaneous powermatching resistancequick evaluation methodpower regulation

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Nano Research
Volume 17 Issue 11,
November 2024
Pages 9999-10007
DOI: 10.1007/s12274-024-6893-x
Cite this article:
Hu Z, Zhong H, Shan H, et al. Quick evaluation and regulation of the maximum instantaneous power and matching resistance for droplet-based electricity generators. Nano Research, 2024, 17(11): 9999-10007. https://doi.org/10.1007/s12274-024-6893-x
Topics:
Nano deviceEnergy

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Received: 07 June 2024
Revised: 05 July 2024
Accepted: 15 July 2024
Published: 06 August 2024
© Tsinghua University Press 2024
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