Understanding and Controlling Electrostatic Discharge in Triboelectric Nanogenerators.

Autor: Leon RT; Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, Australia, 3010., Sherrell PC; Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, Australia, 3010.; School of Science, RMIT University, Melbourne, Victoria, Australia, 3000., Michel JI; Department of Electrical and Electronic Engineering, The University of Melbourne, Parkville, Victoria, Australia, 3010., Bullock J; Department of Electrical and Electronic Engineering, The University of Melbourne, Parkville, Victoria, Australia, 3010., Berry JD; Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, Australia, 3010., Ellis AV; Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, Australia, 3010.
Jazyk: angličtina
Zdroj: ChemSusChem [ChemSusChem] 2024 Sep 09; Vol. 17 (17), pp. e202400366. Date of Electronic Publication: 2024 Apr 18.
DOI: 10.1002/cssc.202400366
Abstrakt: Triboelectric nanogenerators (TENGs) have been widely used to harness various forms of mechanical energy for conversion to electrical energy. However, the contentious challenge in characterising TENGs is the lack of standard protocols for assessing mechanical-to-electrical energy conversion processes. Herein, macroscopic signal analysis is used to identify three key charging events within triboelectric signals: charge induction (CI), contact electrification (CE), and electrostatic discharge (ESD). By considering two phases of motion during contact-separation (approach and departure of the contact materials), CI arising from the motion of bound surface charge (varying electric field) between opposing contact materials is shown to dominate the measured displacement current signal, rather than the process of CE itself. Furthermore, the conventional signal (i. e., voltage, current, charge) interpretation of CE and CI during approach and departure phases is re-assessed, to indicate that the sudden spike of current often observed immediately prior to contact (or after separation) arises from polarity inverting electrostatic discharge (ESD). This aspect of the measured triboelectric effect, which is often ignored, is crucial for the design of TENGs and hence, techniques to enhance the understanding and control over the stochastic occurrence of ESDs is explored. The methods proposed for the deconvolution of the macroscopic signal components of TENGs, and mitigation of ESD occurrences, will allow for precise quantification of the associated charging events. The applications of this study will template the design and development of future super-TENGs with optimised energy conversion capabilities.
(© 2024 The Authors. ChemSusChem published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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