The development of wearable devices such as smart watches, intelligent garments, and wearable health‐monitoring devices calls for suitable energy storage devices which have matching mechanical properties and can provide sufficient power for a reasonable duration. Stretchable fiber‐based supercapacitors are emerging as a promising candidates for this purpose because they are lightweight, flexible, have high energy and power density, and the potential for easy integration into traditional textile processes. An important characteristic that is oftentimes ignored is stretchability—fiber supercapacitors should be able to accommodate large elongation during use, endure a range of bending motions, and then revert to its original form without compromising electrical and electrochemical performance. This article summarizes the current research progress on stretchable fiber‐based supercapacitors and discusses the existing challenges on material preparation and fiber‐based device fabrication. This article aims to help researchers in the field to better understand the challenges related to material design and fabrication approaches of fiber‐based supercapacitors, and to provide insights and guidelines toward their wearability.

中文翻译：

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弹性纤维超级电容器，用于可穿戴式储能

智能手表，智能服装和可穿戴健康监控设备等可穿戴设备的开发要求有合适的储能设备，这些设备应具有匹配的机械性能，并能在合理的时间内提供足够的功率。可拉伸的基于纤维的超级电容器正因其轻巧，柔性，高能量和功率密度以及易于集成到传统纺织工艺中的潜力而成为有前途的候选者。通常被忽略的一个重要特征是可拉伸性-纤维超级电容器应能够在使用过程中适应较大的伸长率，承受一定范围的弯曲运动，然后恢复其原始形状而不会损害电气和电化学性能。本文总结了可拉伸的基于纤维的超级电容器的当前研究进展，并讨论了材料制备和基于纤维的器件制造方面的现有挑战。本文旨在帮助该领域的研究人员更好地理解与基于纤维的超级电容器的材料设计和制造方法有关的挑战，并提供有关其耐磨性的见解和指导原则。