The preparation of piezoelectric materials could provide the new opportunities for capturing the attractive green energy. In this work, a novel polarization-free fused filament fabrication (FFF) 3D printing strategy was proposed for fabrication of a high piezoelectric poly(vinylidene fluoride) (PVDF)/tetraphenylphosphonium chloride (TPPC) nanocomposite energy harvester. It was experimentally found that after incorporating with TPPC nanoparticles, a high β-based polar phase concentration of approximately 83.8% could be achieved for the prepared PVDF/TPPC nanocomposites. In addition, combined with the FFF 3D printing technology, the complex porous structures of the energy harvester was realized, thus resulting in the desired excellent flexibility and piezoelectricity. Typically, for the smart 3D printed nanocomposite energy harvester with incorporation of only 5 wt% TPPC, the obtained open-circuit voltage could be up to 6.62 V, which is approximately 5 times higher than that of neat PVDF and could even successfully drive five commercial green LED lights to normally work. Encouragingly, this novel technique provides a new idea for design and fabrication of piezoelectric energy harvester, and opens up some new possibilities for the FFF 3D printed piezoelectric parts to be applied in various fields such as wireless sensor networks, health care, environmental monitoring and industries.

压电材料的制备可以为捕获有吸引力的绿色能源提供新的机会。在这项工作中，提出了一种新型的无极化熔丝制造 (FFF) 3D 打印策略，用于制造高压聚偏二氟乙烯 (PVDF)/四苯基氯化磷 (TPPC) 纳米复合能量收集器。实验发现，在与 TPPC 纳米粒子结合后，制备的 PVDF/TPPC 纳米复合材料可以达到约 83.8% 的高 β 基极性相浓度。此外，结合FFF 3D打印技术，实现了能量收集器的复杂多孔结构，从而获得了理想的柔韧性和压电性。通常，对于仅掺入 5 wt% TPPC 的智能 3D 打印纳米复合能量收集器，获得的开路电压可高达 6.62 V，大约是纯 PVDF 的 5 倍，甚至可以成功驱动五个商用绿色 LED灯正常工作。令人鼓舞的是，这项新技术为压电能量收集器的设计和制造提供了新思路，并为 FFF 3D 打印压电部件在无线传感器网络、医疗保健、环境监测和工业等各个领域的应用开辟了一些新的可能性。 .