Direct Current Fabric Triboelectric Nanogenerator for Bio-Motion Energy Harvesting.

Triboelectric nanogenerators (TENGs) have demonstrated their promising potential in bio-motion energy harvesting. A combination of the TENG and textile materials presents an effective approach toward smart fabric. However, most traditional fabric-TENGs with alternating current (AC) have to use stiff, uncomfortable and unfriendly rectifier bridge to obtain direct current (DC) to store and supply power for electron devices. Here, a DC Fabric-TENG (DC F-TENG) with the most common plain structure, is designed to harvest bio-motion energy by tactfully taking advantage of the harmful and annoying electrostatic breakdown phenomenon of clothes. A small DC F-TENG (1.5 cm × 3.5 cm) can easily light up 416 serially connected light-emitting diodes (LEDs). Furthermore, some yarn super-capacitors (SCs) are fabricated and woven into the DC F-TENG to harvest, store energy and power electron devices, such as a hygrothermograph or a calculator, which shows great convenience and high-efficiency in practice. This low cost and efficient DC F-TENG which can directly generate DC energy without using the rectifier bridge by harvesting energy from unhealthy electrostatic breakdown has great potential as a lightweight, flexible, wearable and comfortable energy harvesting device in the future.

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