With the advancement of wearable electronics, stretchable energy harvesters are attractive to reduce the need of frequent charging of wearable devices. In this work, a stretchable kirigami piezoelectric nanogenerator (PENG) based on barium titanate (BaTiO₃) nanoparticles, Poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)) matrix, and silver flakes-based electrode is fabricated in an all-3D printable process suited for additive manufacturing. The 3D printable extrusion ink is formulated for facile solvent evaporation during layer formation to enable heterogenous multilayer stacking. A well-designed modified T-joint-cut kirigami structure is realized to attain a non-protruding, high structural stretchability performance, overcoming the out-of-plane displacement of the typical kirigami structure and therefore enabling the pressing-mode of a kirigami-structured PENG. This PENG can be stretched to more than 300% strain, which shows a great potential for application in wearable electronic systems. Furthermore, a self-powered gait sensor is demonstrated using this PENG.

随着可穿戴电子设备的发展，可伸缩能量收集器对于减少对可穿戴设备频繁充电的需求具有吸引力。在这项工作中，基于钛酸钡（BaTiO ₃）纳米粒子，聚偏二氟乙烯-三氟乙烯共聚物（P（VDF-TrFE））基质和片状银电极是通过适用于增材制造的全3D可印刷工艺制造的。可将3D可打印的挤出油墨配制为在层形成过程中易于溶剂蒸发以实现异质多层堆叠。精心设计的修改后的T形切角折纸结构可实现非突出的高结构拉伸性能，克服了典型折纸结构的平面外位移，从而实现了折纸模式的压模。结构化的PENG。该PENG可以拉伸到300％以上的应变，这显示了在可穿戴电子系统中的巨大应用潜力。此外，使用该PENG演示了自供电步态传感器。