Triboelectric sensor reports stable voltage output in varying pressures and frequencies, suggesting advances in energy harvesting applications.
To address the issues of pressure-induced interference in existing non-pressure triboelectric sensors and the insufficient output power of nanogenerators as energy harvesting devices, a triboelectric nanogenerator (TENG) based on a multi-walled carbon nanotubes/polydimethylsiloxane (MWCNTs/PDMS) composite film was fabricated. Triboelectric performance tests showed that the output voltage and current of the fabricated TENG increased by 141% and 278%, respectively, compared to those of the pristine PDMS film. Response experiments under different pressures and frequencies demonstrated that, on the one hand, the output voltage of the TENG exhibited very limited sensitivity to both pressure and frequency, with sensitivities of only 0.01989 V/kPa and 0.0558 V/Hz, respectively, ensuring a stable voltage output. On the other hand, the output current of the TENG exhibited a sensitivity of 0.1645 μA/Hz to the frequency, and its sensitivity to pressure was only 0.00137 μA/kPa, enabling the TENG to achieve accurate detection of frequency within a certain pressure range when used as a frequency sensor. This work provides an effective approach for expanding the applications of triboelectric nanogenerators in energy harvesting and self-powered sensing fields.
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Liu et al. (2025) studied this question.