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Triboelectric Nanogenerator With Enhanced Performance via an Optimized Low Permittivity Substrate

Min, Gunabo; Manjakkal, Libu; Mulvihill, Daniel M.; Dahiya, Ravinder S.

Authors

Gunabo Min

Daniel M. Mulvihill

Ravinder S. Dahiya



Abstract

With electrical power generated from mechanical contact, triboelectric nanogenerators (TENGs) offer a promising route to realizing self-powered sensors. For effective usage, it is important to improve their limited power range (0.1–100 mW/cm 2 ) and this can be achieved by optimizing the output performance. Among the factors that confer higher performance are materials with a strong triboelectric effect together with low permittivity, but it is challenging to optimize both within a single material. This paper presents a solution to this challenge by optimizing a low permittivity substrate beneath the tribo-contact layer. Results are simulated over a range of substrate permittivities. The open circuit voltage is found to increase by a factor of 1.6 in moving from PVDF to the lower permittivity PTFE. Two TENG devices have been fabricated with 100μm PET and PTFE substrates to compare performance. The experiments confirm that lowering the substrate dielectric constant (i.e. PET to PTFE) raises the open circuit voltage in line with simulation predictions.

Journal Article Type Article
Acceptance Date Aug 30, 2019
Online Publication Date Aug 30, 2019
Publication Date Jul 1, 2020
Deposit Date Jul 19, 2022
Journal IEEE Sensors Journal
Print ISSN 1530-437X
Electronic ISSN 1558-1748
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 20
Issue 13
Pages 6856-6862
DOI https://doi.org/10.1109/jsen.2019.2938605
Keywords Triboelectric nanogenerator, self-powered sensors, simulation, permittivity, dielectric
Public URL http://researchrepository.napier.ac.uk/Output/2890647