Issue 22, 2024

Charge target collection from different triboelectrification domains by electrostatic induction and polarization enabled air discharges

Abstract

Collecting interfacial tribo-charges is the core of efficient energy conversion in DC triboelectric nanogenerators (DC-TENGs), which is currently realized by electrostatic induction enabled discharges (EID) on side electrodes from nearby tribo-charges. However, the charge collection efficiency is hindered by insufficient collection inside the tribo-layer and non-directional discharges. Herein, different from the traditional DC-TENGs with two electrodes on the sides of the slider, two new dynamic electrodes are positioned below the thick dielectric substrate with a small air gap and move synchronously with the slider. A strong electric field established in the gap causes dynamic dielectric polarization enabled discharges (DPD) on the bottom electrodes, realizing the collection of tribo-charges inside the interface and regulating harmful discharge near the EID. Consequently, the tribo-charges from different triboelectrification domains are fully harvested in target channels, by which the output energy of this charge target collection TENG (CTC-TENG) is increased to 3.85 mJ (EID + DPD) from 0.7 (DPD) and 1.89 mJ (EID), demonstrating a synergistic effect where 1 + 1 > 2. Additionally, the CTC-TENG is utilized for wireless position sensing and energy supply. This work provides important insights into the triboelectrification domains and finds an innovative way for tribo-charge target collection to achieve high output energy.

Graphical abstract: Charge target collection from different triboelectrification domains by electrostatic induction and polarization enabled air discharges

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Article information

Article type
Paper
Submitted
05 Sep 2024
Accepted
14 Oct 2024
First published
25 Oct 2024

Energy Environ. Sci., 2024,17, 8942-8953

Charge target collection from different triboelectrification domains by electrostatic induction and polarization enabled air discharges

K. Li, S. Gong, S. Fu, H. Guo, C. Shan, H. Wu, J. Wang, S. Xu, G. Li, Q. Zhao, X. Wang and C. Hu, Energy Environ. Sci., 2024, 17, 8942 DOI: 10.1039/D4EE04035J

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