A next-generation triboelectric nanogenerator (TENG) to realize constant current from electrostatic breakdown

phys.org | 9/27/2018 | Staff
doona07 (Posted by) Level 3
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Working principle of the DC-TENG. (A) (i) Phenomenon of the triboelectrification effect and electrostatic breakdown (lightning) in nature. (ii) Working mechanism of a conventional TENG. (B) A schematic illustration of the sliding mode DC-TENG. (C) Working mechanism of the sliding mode DC-TENG in full cyclic motion. (D) Equivalent circuit model of the DC-TENG. (E) Constant current output of the DC-TENG. Credit: Science Advances, doi: 10.1126/sciadv.aav6437.

Scientists have dedicated intense work in recent years to convert environmental energy into electricity to meet the ongoing demands for a cleaner and more sustainable power source. Harvesting environmental mechanical energy as an eco-friendly method is a promising solution and plays a significant role in building wearable electronics and sensor networks in the Internet of Things (IoTs). A triboelectric nanogenerator (TENG) is a self-powered, feasible solution to convert mechanical energy into electricity and specifically satisfy the increasing demand of the internet of things (IoTs).

Work - Di - Liu - Co-workers - Departments

In the present work, Di Liu and co-workers at the Departments of Nanoenergy and Nanosystems, Materials Science and Engineering, and Nanoscience and Technology in China and the USA, developed a next-generation TENG to realize constant current output by coupling the triboelectrification effect and electrostatic breakdown. They obtained a triboelectric charge density (430 µC m-2), much higher than those with conventional TENG—that were limited by electrostatic breakdown. The findings of the study are now published in Science Advances, to promote the miniaturization of self-powered systems for use in IoTs and provide a paradigm shift technique to harvest mechanical energy.

Lightweight and wearable power supply modules with high energy storage performance are desirable for wearable technology in materials science. They can be conventionally achieved by directly integrating a rechargeable energy storage device, i.e. a battery or supercapacitor into fabrics. Mechanical energy harvesting has attracted much attention as explored through the techniques of electromagnetic generators (EMGs), piezoelectric...
(Excerpt) Read more at: phys.org
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