Owing to the limitations of two-dimensional devices such as easily damaged and airtight characteristics in practical applications, flexible fiber electronics which can narrow the gap between devices and wearable applications due to their unique stitchable function have been attracting tremendous attention nowadays. Here, this paper introduced a simple strategy for fabricating the piezoelectric microfiber with a novel core-sheath structure by directly electrospinning the poly(vinydene fluoride-trifluoroethylene) (P(VDF-TrFE)) onto the flexible conductive wire. Precise control of the fiber diameter and thickness of P(VDF-TrFE) functional layer can be achieved. Specifically, this stitchable fiber exhibits high sensitivity of 60.82 mV/N and excellent durability of 15000 cycles under positive compression, and finite element method (FEM) was carried out cooperating with practical experiment to analyze the stress and electric field distribution of piezoelectric fibers under both positive compression and bending modes through COMSOL software. The flexible stitchable fiber can bear various complex, even severe deformations such as bending and knotting, enabling itself to be woven into textile and further generate power and response when subjected to external deformation, which is of significance for the portable and wearable electronics that are expected to be breathable and comfortable. This work also offers a general and effective solution for the flexible and wearable electronic devices.

由于二维装置的局限性，例如在实际应用中容易损坏和气密性，柔性纤维电子器件由于其独特的可缝合功能而能够缩小装置与可穿戴应用之间的距离，如今已引起了极大的关注。在这里，本文介绍了一种简单的策略，通过将聚偏二氟乙烯-三氟乙烯（P（VDF-TrFE））直接电纺到柔性导线上来制造具有新颖芯-鞘结构的压电微纤维。可以精确控制P（VDF-TrFE）功能层的纤维直径和厚度。具体来说，这种可缝制纤维在正压下表现出60.82 mV / N的高灵敏度和15000次循环的出色耐久性，并结合实际实验进行了有限元方法（FEM），通过COMSOL软件分析了正压缩和弯曲模式下压电纤维的应力和电场分布。柔性可缝制纤维可以承受各种复杂的，甚至是严重的变形，例如弯曲和打结，使其能够被编织成纺织品，并在受到外部变形时进一步产生动力和响应，这对于预期的便携式和可穿戴电子设备而言是重要的透气舒适。这项工作还为柔性和可穿戴电子设备提供了一种通用且有效的解决方案。