Flexible high-performance piezoelectric nanogenerators (PNG) that can convert mechanical energy into electricity are crucial for the development of self-powered wearable electronic devices. In this work, a 3D multilayer assembly of flexible organic polypyrrole (PPy) electrodes, electrospun poly(vinylidene fluoride) (PVDF) nanofibers and electrosprayed CsPbBr₃@PVDF beads was proposed for a high-performance PNG, wherein two layers of CsPbBr₃@PVDF beads were inserted between the top/bottom PPy electrodes and PVDF nanofibers layer, respectively. The PPy electrodes were fabricated via vapour phase polymerization of pyrrole monomers on the surface of the electrospun PVDF nanofibers with FeCl₃ acted as an oxidant. As for the active piezoelectric layers, both the PVDF nanofibers and CsPbBr₃@PVDF beads possessed high fractions of β crystalline phase, i.e., 83.5% and 94%, respectively, which helps to provide favorable polarization response. Besides, the introduction of the globular CsPbBr₃@PVDF particles also facilitated the stress excitation to the piezoelectric layers, thus leading to enhanced output performance and high sensitivity. Piezoelectric results showed that the 3D multilayer NFMs based PNG exhibited a high open-circuit voltage of 10.3 V and a short-circuit current density of 1.29 μA/cm², and could detect a weak pressure as low as 7.4 Pa. Furthermore, the PNG based fabrics also demonstrated excellent ability to harvest energy from the temperature fluctuations through pyroelectric effect. The structuration method of embedding globular particles into electrospun PVDF NFMs may open up the feasibility of fabricating high-output PNG.

可以将机械能转化为电能的柔性高性能压电纳米发电机（PNG）对于自供电可穿戴电子设备的开发至关重要。在这项工作中，3D多层组件柔性有机聚吡咯（PPY）的电极，电纺丝的聚（偏二氟乙烯）（PVDF）纳米纤维和电喷雾CsPbBr _3个@PVDF珠提出其中CsPbBr两层用于高性能PNG，₃ @将PVDF珠子分别插入顶部/底部PPy电极和PVDF纳米纤维层之间。PPy电极是通过用FeCl ₃在电纺PVDF纳米纤维表面上的吡咯单体进行气相聚合制备的。充当氧化剂。对于活性压电层，PVDF纳米纤维和CsPbBr ₃ @PVDF珠均具有高比例的β晶相，即分别为83.5％和94％，这有助于提供有利的极化响应。此外，球状CsPbBr ₃ @PVDF颗粒的引入也促进了对压电层的应力激发，从而提高了输出性能和高灵敏度。压电结果表明，基于3D多层NFM的PNG表现出10.3 V的高开路电压和1.29μA/ cm ²的短路电流密度，并且可以检测到低至7.4 Pa的弱压力。此外，基于PNG的织物还表现出出色的通过热电效应从温度波动中收集能量的能力。将球形颗粒嵌入电纺PVDF NFM中的结构化方法可能会开辟制造高产量PNG的可行性。