Abstract
The triboelectric nanogenerator (TENG) is a newly arisen technology for mechanical energy harvesting from the environment, such as raindrops, wind, tides, and so on. It has attracted widespread attention in flexible electronics to serve as self-powered sensors and energy-harvesting devices because of its flexibility, durability, adaptability, and multi-functionalities. In this work, we fabricated a tubular flexible triboelectric nanogenerator (TF-TENG) with energy harvesting and human motion monitoring capabilities by employing polydimethylsiloxane (PDMS) as construction material, and fluorinated ethylene propylene (FEP) films coated with Cu as the triboelectric layer and electrode, serving in a free-standing mode. The tube structure has excellent stretchability that can be stretched up to 400%. Modifying the FEP films to obtain a superhydrophobic surface, the output performance of TF-TENG was increased by at least 100% compared to an untreated one. Finally, as the output of TF-TENG is sensitive to swing angle and frequency, demonstration of real-time monitoring of human motion state was realized when a TF-TENG was worn on the wrist.
Highlights
With the rapid development of a new generation of digital information technology, the implementation of various portable and wireless electronic devices has changed the way people live [1,2,3,4], and one consequence is that the energy supply of these electronic devices has become a critical challenge
As a new energy harvesting technology, triboelectric nanogenerators (TENGs) are based on the coupling effect of triboelectrification effect and electrostatic induction [5], which was first invented by Wang and coworkers in
2a sketches the structure ofof a tubular flexible triboelectric nanogenerator (TF-TENG), and
Summary
With the rapid development of a new generation of digital information technology, the implementation of various portable and wireless electronic devices has changed the way people live [1,2,3,4], and one consequence is that the energy supply of these electronic devices has become a critical challenge. As a new energy harvesting technology, triboelectric nanogenerators (TENGs) are based on the coupling effect of triboelectrification effect and electrostatic induction [5], which was first invented by Wang and coworkers in. TENGs can fit into different application scenarios, to serve as, for example, micro/nano energy harvesters [17,18,19] and self-power sensor systems [20,21,22,23].
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