Gas-liquid, two-phase, flow-based triboelectric nanogenerator with ultrahigh output power

Gas-liquid, two-phase, flow-based triboelectric nanogenerator with ultrahigh output power
Structural design and performance of the GL-TENG. (A) Schematic diagram of GL-TENG and a detailed discharge effect mechanism. The inserts show the corresponding partial physical diagrams. PTFE, polytetrafluoroethylene. (B) Comparison of current output between GL-TENG (in red) and the control device (in black). (C) Peak voltage output of GL-TENG (in red) is more than three orders of magnitude higher than that from the control device (in black). (D) Stability test of GL-TENG with a continuous jet-on time of 0.2 s and a jet-off time of 0.5 s for more than 10,000 cycles, and 1500 LEDs can be powered when 1.0 ml of liquid is used by the GL-TENG. (E) Comparison of the peak voltage value obtained in this work with other reports. SL-TENG, solid-liquid TENG. PF-TENG, Pulsatile Flow-triboelectric nanogenerator; SE-DEG, single electrode droplet-based electricity generator; FB-TENG, floating buoy-based triboelectric nanogenerator; W-TENG, water-solid triboelectric nanogenerator; VEEG, volume-effect electricity generator; DEG, droplet-based electricity generator. Credit: Science Advances (2022). DOI: 10.1126/sciadv.add0464

Chinese researchers have designed a gas-liquid two-phase flow-based triboelectric nanogenerator (GL-TENG) with ultrahigh output power, according to a research article recently published in Science Advances.

Triboelectrification of solid-liquid interfaces has shown great potential for water-based harvesting applications. However, it is still a great challenge to realize the efficient collection of triboelectric energy at the solid-liquid interface through interface regulation.

Recently, researchers from the Lanzhou Institute of Chemical Physics (LICP) of the Chinese Academy of Sciences, have designed a GL-TENG to boost the power output of the solid-liquid triboelectric nanogenerators (SL-TENGs), by significantly increasing the solid-liquid contact electrification (CE) area and relative separation speed.

The GL-TENG can achieve ultrahigh voltage and volumetric charge density of 3789 volts and 859 millicoulombs per cubic meter, respectively. With a high-power output of 143.6 kilowatts per cubic meter, a 24-watt commercial lamp can be directly lighted by a continuous-flow GL-TENG device.

The rapid accumulation of interfacial triboelectrification is realized through the intense friction between the gas-liquid two-phase flow and the pipe wall. Through the innovative mechanism of coupling triboelectrification and electrostatic release, the electrical output performance of the power generation device is greatly improved.

This work has developed a new gas-liquid two-phase flow-based model of an electricity generator, and demonstrated the ability to drive various electronic devices directly. It has also provided a new strategy for efficiently harvesting energy from water and opened up an avenue for future commercial use for SL-TENGs.

More information: Yang Dong et al, Gas-liquid two-phase flow-based triboelectric nanogenerator with ultrahigh output power, Science Advances (2022). DOI: 10.1126/sciadv.add0464

Journal information: Science Advances

Citation: Gas-liquid, two-phase, flow-based triboelectric nanogenerator with ultrahigh output power (2022, December 1) retrieved 8 February 2023 from https://techxplore.com/news/2022-12-gas-liquid-two-phase-flow-based-triboelectric-nanogenerator.html
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