Wearable energy storage with super mechanic flexibility, stretchability and safety has been in pursuit for smart flexible textiles. Fiber batteries, though having their superiority in spinnability, knittability and adaptability for breathable textiles with comparison to planar batteries, were normally produced with complicated procedures. To simplify the production process, in this study we showed that stretchable and scissorable Zinc-ion battery fibers could be spun through a dual-core spinning head with double concentric sheathes, by combining a one-step coaxial wet-spinning process and an photo-polymerization process. The resultant fibers showed super stretchability up to 500 % strain. The presence of outer protection layer also offered super abrasion resistance and endurability to water and stress. Besides the spinnability and knittability into fabric, the battery fibers also maintained their functionality even after being cut into short segments. Thus, this study may not only offer a platform of one-step coaxial wet spinning process to produce battery fibers, but also offer an endurable energy-storage solution applicable in various wearable devices.

中文翻译：

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同轴纺可拉伸锌离子电池纤维，具有防水、可剪性

具有超强机械灵活性、可拉伸性和安全性的可穿戴储能一直是智能柔性纺织品的追求。与平面电池相比，纤维电池虽然在可纺性、可编织性和对透气纺织品的适应性方面具有优势，但通常生产过程复杂。为了简化生产过程，在这项研究中，我们展示了可拉伸和可剪切的锌离子电池纤维可以通过具有双同心护套的双芯纺丝头，通过结合一步同轴湿法纺丝工艺和光纺工艺来纺丝。聚合过程。所得纤维显示出高达 500% 应变的超拉伸性。外保护层的存在还提供了超强的耐磨性以及对水和压力的耐受性。除了可纺性和可针织性外，电池纤维即使被切成短段后也能保持其功能性。因此，这项研究不仅可以提供一个一步同轴湿法纺丝工艺来生产电池纤维的平台，而且可以提供一种适用于各种可穿戴设备的耐用储能解决方案。