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Direct Current Contact-Mode Triboelectric Nanogenerators via Systematic Phase Shifting

Dharmasena, R. D. I. G., Cronin, H.M, Dorey, R. and Silva, S. R. P. (2020) Direct Current Contact-Mode Triboelectric Nanogenerators via Systematic Phase Shifting Nano Energy.

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Contact Mode DC TENG R2.docx - Accepted version Manuscript
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The intermittency and discontinuous nature of power generation in Triboelectric Nanogenerators (TENGs) are arguably their most significant drawback, despite the promise demonstrated in low-power electronics. Herein, we introduce a novel technology to overcome this issue, in which, built-in systematic phase shifting of multiple poles is used to design a pseudo direct-current TENG. Unlike previous attempts of constructing near direct-current TENGs that base on the segmentation of electrodes of a sliding mode TENG, this technology introduces a new method that depends on planned excitation of constituent TENG units at different time intervals to obtain the necessary phase shifts, achieved by their structural design that contains an asymmetric spatial arrangement. Therefore, the direct current generation for TENG, which was previously limited to the sliding mode TENG units, are expanded to contact-mode TENGs. The technology allows for continuous and smooth operation of the driven loads and paves the way for a new dawn in energy scavenging from mechanical sources. We use the distance-dependent electric field (DDEF) platform to design the systematic phase shifting technology, which is experimentally demonstrated via a free-standing mode TENG (FSTENG) based design, to power a number of prototype devices. The resultant power output of the TENG indicates a crest factor close to 1.1 at relatively low frequencies, the best reported values for TENGs with contact-mode basic units, to date. This work provides a highly awaited solution to overcome the intermittency and sporadic nature of TENG outputs, thus, promoting the field towards powering next generation autonomous and mobile electronics.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
Dharmasena, R. D. I.
Cronin, H.M
Silva, S. R.
Date : 31 May 2020
Funders : EPSRC, Loughborough University Doctoral Prize Fellowship, Royal Commission for the Exhibition of 1851 Research Fellowship Award
Grant Title : EPSRC Grant
Depositing User : James Marshall
Date Deposited : 05 Jun 2020 13:52
Last Modified : 05 Jun 2020 13:52

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