Abstract
In this paper, a flexible and stretchable energy harvester based on liquid-metal and fluorinated ethylene propylene (FEP) electret films is proposed and implemented for the application of wearable devices. A gallium liquid-metal alloy with a melting point of 25.0 °C is used to form the stretchable electrode; therefore, the inducted energy harvester will have excellent flexibility and stretchability. The solid-state electrode is wrapped in a dragon-skin silicone rubber shell and then bonded with FEP electret film and conductive film to form a flexible and stretchable energy harvester. Then, the open-circuit voltage of the designed energy harvester is tested and analyzed. Finally, the fabricated energy harvester is mounted on the elbow of a human body to harvest the energy produced by the bending of the elbow. The experimental results show that the flexible and stretchable energy harvester can adapt well to elbow bending and convert elbow motion into electric energy to light the LED in a wearable watch.
Highlights
With the development of wearable devices, flexible and stretchable power supplies have become key technologies [1,2]
We proposed to use liquid-metal alloy and fluorinated ethylene propylene (FEP) as electrode to design energy harvester and verify its feasibility
Energy conversion conversion schematic schematic of flexible and stretchable energy harvester based on gallium liquid-metal alloy
Summary
With the development of wearable devices, flexible and stretchable power supplies have become key technologies [1,2]. Compared with the previous energy harvester and sensors [24,25,26,27], we proposed to make flexible wearable energy harvesters with liquid metal alloy electrodes. We proposed to use liquid-metal alloy and fluorinated ethylene propylene (FEP) as electrode to design energy harvester and verify its feasibility. Example, themetals conductive electrode is designed in a form that can be conductors stretched, and Liquid are the most flexible and stretchable electrical duethe totwo the electrodes fluidity of are together. Thepaper, feasibility of using liquid metals as stretchable electrodes is verified in this In this we propose a flexible and energy harvester based onpaper. Theand brand of double-sided wires on its use double-sided stick electret, but not the adhesive isThe. The of electrode in the adhesive solid stateis is M. wrapped in a dragon-skin silicone shell elastomer.
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