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Related Experiment Video

Updated: Jul 13, 2026

Ultrasound Velocity Measurement in a Liquid Metal Electrode

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Published on: August 5, 2015

Enhancing the Performance of Triboelectric Generator: A Novel Approach Using Solid-Liquid Interface-Treated Foam and

Quang Tan Nguyen¹, Duy Linh Vu², Chau Duy Le¹

¹Graduate School of Mechanical Engineering, University of Ulsan, 93, Daehak-ro, Nam-gu, Ulsan 44610, Republic of Korea.

|May 27, 2023

Summary

This study presents a novel solid-liquid interface-treated foam triboelectric generator (SLITF-TEG). This innovative device efficiently harvests mechanical energy, offering higher current density and direct current output compared to traditional designs.

Keywords:

direct-current triboelectric generators material work function mechanical-to-electrical conversion self-powered sensor solid–liquid interface-treated foam

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Area of Science:

Energy Harvesting
Materials Science
Triboelectricity

Background:

Triboelectric generators (TEGs) are crucial for harvesting ambient mechanical energy.
Traditional TEGs often face limitations such as low current density and alternating current output.
Developing efficient and versatile TEG designs is essential for widespread energy harvesting applications.

Purpose of the Study:

To introduce a novel solid-liquid interface-treated foam (SLITF) as the active layer in a triboelectric generator (TEG).
To investigate the performance enhancement of the SLITF-TEG compared to traditional TEGs.
To explore the potential of SLITF-TEG for self-powered sensing applications.

Main Methods:

Fabrication of SLITF by treating cellulose foam with water.
Integration of SLITF with metal contacts of different work functions to create the SLITF-TEG.
Characterization of the electrical output (current density, power density, voltage) and sensing capabilities of the SLITF-TEG.

Main Results:

The SLITF-TEG achieved a high current density of 3.57 A/m² and harvested electric power up to 0.174 W/m² at approximately 0.55 V.
The device generates a direct current, overcoming limitations of traditional TEGs.
Configurable SLITF-TEG units achieved peak voltage of 3.2 V and current of 12.5 mA.
Demonstrated high-accuracy self-powered vibration sensing (R² = 0.99).

Conclusions:

The SLITF-TEG offers a significant advancement in triboelectric energy harvesting.
The unique solid-liquid interface facilitates efficient charge separation and transfer.
SLITF-TEG shows great promise for harvesting low-frequency mechanical energy and for self-powered sensor applications.