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Polystyrene-Based Triboelectric Nanogenerators for Self-Powered Multifunctional Human Activity Monitoring

Cite this: ACS Appl. Energy Mater. 2022, 5, 12, 15881–15889
Publication Date (Web):December 8, 2022
https://doi.org/10.1021/acsaem.2c03406
Copyright © 2022 American Chemical Society

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    Abstract

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    Polystyrene (PS)-based triboelectric nanogenerators (PS-TENGs) with PS as the primary friction layer have been reported. PS-TENGs were developed by a simple drop-cast method and arranged in vertical contact-separation mode with aluminum as the other triboelectric layer. The PS-TENG (area: ∼15 cm2) prepared with 40 mg/mL PS solution generated an open-circuit voltage of ∼140 V, short-circuit current of ∼6 μA, and instantaneous power of ∼120 μW (power density of ∼80 mW/m2) when subjected to a force of ∼12 N. The PS-TENG also powered 120 green light-emitting diodes and low-power electronic systems like a calculator and digital clock. The PS-TENG was further explored as a self-powered human motion monitoring device where it effectively detected trivial human motions like hand tapping, walking, running, jumping, and various joint movements. In addition, small-scale motions like that of fingers and coughing impulses and throat-clearing vibrations in the throat, nasal breath, and mouth air blows were also precisely captured by the PS-TENG. These results signified huge capabilities of PS as a triboelectric material, which remains widely unexplored despite its suitable position in the triboelectric series.

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    Supporting Information

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsaem.2c03406.

    • Transferred charge calculations (Figure S1) (PDF)

    • LEDs, scientific calculator, and digital clock powered by the PS-TENG (Video S1) (MP4)

    • PS-TENG response to walking, running, and jumping when attached at the bottom of the shoe (Video S2) (MP4)

    • Detection of normal and deliberate nasal breath and mouth air blows using the PS-TENG (Video S3) (MP4)

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