Issue 6, 2023

Fractal structured charge-excitation triboelectric nanogenerators for powering portable electronic devices

Abstract

Effective power management on the outputs of triboelectric nanogenerators (TENGs) is critical for their practical applications due to the large impedance and unbalanced load matching. Recently proposed voltage multiplying circuits for external-charge excitation and self-charge excitation are usually unstable and require reversal for device restarting and common switched-capacitor-converters usually cause large switching losses. In this work, we fabricated a fractal structured charge-excitation circuit for TENGs using diodes and capacitors. The fractal switched-capacitor-converter coupled with voltage regulator diodes can greatly boost the output charge and current of the TENG without reverse starting. The managed output performance of the TENG can be controlled by the electronic component parameters and external operating frequency. Through the component and condition optimization, the fractal structured charge-excitation TENG (FSC-TENG) can achieve nearly 5.8 times charge boosting and almost 16.8 times power boosting in the pulsed mode. Furthermore, the FSC-TENG successfully drove a hygrothermograph and was integrated into a yoga mat for harvesting human-body motion energy to power an electronic watch and a pedometer. The FSC-TENG with good charge accumulation properties and stability is a promising candidate for practical self-powered applications.

Graphical abstract: Fractal structured charge-excitation triboelectric nanogenerators for powering portable electronic devices

Supplementary files

Article information

Article type
Paper
Submitted
11 Nov. 2022
Accepted
31 Dec. 2022
First published
05 Janv. 2023

Nanoscale, 2023,15, 2820-2827

Fractal structured charge-excitation triboelectric nanogenerators for powering portable electronic devices

H. Long, J. An, S. Xu, X. Ni, E. Su, Y. Luo, S. Liu and T. Jiang, Nanoscale, 2023, 15, 2820 DOI: 10.1039/D2NR06328J

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