Unravelling the ageing effects of PDMS‐based triboelectric nanogenerators

Journal article

Abstract:: Ageing of elastomeric materials in triboelectric nanogenerators (TENGs) often leads to compromised electrical performance and can greatly affect their real-world application as next-generation energy harvesters and self-powered sensors. Herein, the ageing behavior of PDMS-based TENGs is investigated by probing the dielectric and mechanical properties of the membrane materials. Over time, ageing of PDMS after 17 months is evinced by a decline by 71%, 68% and 52% in open-circuit voltage, short-circuit current and charge transfer, respectively, and an increase by 6.8 times in surface charge decay rate. The reduced electrical performance can be attributed to a decrease in work function, dielectric constant, surface adhesion and heterogeneity in stiffness, as well as an increase in loss tangent. The effect of chemical chain scission on the PDMS surface is confirmed through nearfield infrared nanospectroscopy. This study gives insights into the underlying mechanism behind the ageing of PDMS-based TENGs, paving the way to future work for ameliorating these ageing-related issues with the aim to ensure long-term stability of practical triboelectric devices.

Files:: Xu_et_al_2024_Unravelling_the_ageing.pdf

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Language:: English
Keywords:: polymer ageing

mechanical properties

poly- dimethylsiloxane elastomer

nanogenerators

contact electrification
Pubs id:: 1992280
Local pid:: pubs:1992280
Deposit date:: 2024-04-30

Copyright holder:: Xu et al
Rights statement:: © 2024 The Authors. Advanced Materials Interfaces published by Wiley-VCH GmbH This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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