The urgent demand for portable electronics has promoted the development of high-efficiency, sustainable, and even stretchable self-charging power sources. In this work, we propose a flexible self-charging power unit based on folded carbon (FC) paper for harvesting mechanical energy from human motion and power portable electronics. The present unit mainly consists of a triboelectric nanogenerator (FC-TENG) and a supercapacitor (FC-SC), both based on folded carbon paper, as energy harvester and storage device, respectively. This favorable geometric design provides the high Young’s modulus carbon paper with excellent stretchability and enables the power unit to work even under severe deformations, such as bending, twisting, and rolling. In addition, the tensile strain can be maximized by tuning the folding angle of the triangle-folded carbon paper. Moreover, the waterproof property of the packaged device make it washable, protect it from human sweat, and enable it to work in harsh environments. Finally, the as-prepared self-charging power unit was tested by placing it on the human body to harvest mechanical energy from hand tapping, foot treading, and arm touching, successfully powering an electronic watch. This work demonstrates the impressive potential of stretchable self-charging power units, which will further promote the development of high Young’s modulus materials for wearable/portable electronics.

中文翻译：

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基于折叠式复写纸的用于便携式电子产品的灵活的自充电电源装置

对便携式电子产品的迫切需求促进了高效，可持续甚至可扩展的自充电电源的发展。在这项工作中，我们提出了一种基于折叠碳（FC）纸的灵活的自充电动力装置，用于从人体运动和便携式电子设备中收集机械能。本单元主要由摩擦电纳米发电机（FC-TENG）和超级电容器（FC-SC）组成，两者均基于折叠的碳纸，分别用作能量收集器和存储装置。这种有利的几何设计为高杨氏模量的碳纸提供了出色的拉伸性，并使动力单元即使在严重的变形（例如弯曲，扭曲和滚动）下也能正常工作。另外，可以通过调整三角形折叠的碳纸的折叠角度来使拉伸应变最大化。此外，包装设备的防水性能使其可水洗，保护其免受人类汗液侵蚀，并使其能够在恶劣的环境下工作。最后，对准备好的自充电动力装置进行了测试，方法是将其放在人体上以从敲击，踩脚和手臂触摸中收集机械能，从而成功为电子表供电。这项工作证明了可伸缩自充电电源装置的巨大潜力，这将进一步促进可穿戴/便携式电子产品的高杨氏模量材料的开发。踩脚和手臂触摸，成功为电子表供电。这项工作证明了可伸缩自充电电源装置的巨大潜力，这将进一步促进可穿戴/便携式电子产品的高杨氏模量材料的开发。踩脚和手臂触摸，成功为电子表供电。这项工作证明了可伸缩自充电电源装置的巨大潜力，这将进一步促进可穿戴/便携式电子产品的高杨氏模量材料的开发。