The development of wearable piezoelectric nanogenerator (PENG) has recently drawn extensive attention, especially in selecting lead-free piezoelectric materials with high piezoelectric coefficients. Barium Titanate (BTO) is a kind of environment-friendly piezoelectric ceramics. PENGs derived from BTO based piezo-fillers have recently attracted broad concern. However, the exploration of flexible electrodes and the application of wearable PENGs functioned with imitating tactile have usually been ignored in the pursuit of high output performance. Herein, The porous piezoelectric fillers composed of 0.82Ba(Ti_0.89Sn_0.11)O₃-0.18(Ba_0.7Ca_0.3)TiO₃ are prepared by a freeze-drying method, and then the polydimethylsiloxane (PDMS) is filled into the micropores of the piezoelectric ceramics, forming a distinctive 3D interconnected structure with evenly distributed inorganic piezoelectric materials. Both doping and structure modification can boost the output performance of the BTO-based PENG, from which the rational doping plays a major role in enhancing the electrical output in the current PENG system. To realize fully flexible piezoelectric nanogenerator (PENG), sliver nanowires network integrated with PDMS is adopted as the flexible electrodes, which was fabricated by the techniques combining vacuum filtration with subsequent dry transfer process. The PENG can deliver a maximum open-circuit voltage (V_OC) of 39 V and short-circuit (I_SC) current of 2.9 μA under a vertical force of 35 N at 2 Hz, with the maximum instantaneous power of 24.2 μW. Moreover, the device can effectively exhibit electric output signal whenever subjected to external pressing or bending stress. The output performance of the PENG at via vertical pressing stress is higher than that bending stress, which is also confirmed by COMSOL simulation. The PENG can not only be employed to harvest biomechanical energy such as digital joints movement, but also display a potential for a tactile perception. This work has established a deep association between lead-free ceramic and wearable imitated touch reception sensors by virtue of flexible PENG, which will paint a magnificent picture for flexible electronics.

可穿戴式压电纳米发电机（PENG）的发展最近引起了广泛的关注，特别是在选择具有高压电系数的无铅压电材料方面。钛酸钡（BTO）是一种环保型压电陶瓷。由基于BTO的压电填充材料衍生的PENG最近引起了广泛关注。然而，在追求高输出性能时，通常忽略了对柔性电极的探索以及具有模拟触觉功能的可穿戴式PENG的应用。此处，由0.82Ba（Ti _0.89 Sn _0.11）O ₃ -0.18（Ba _0.7 Ca _0.3）TiO ₃组成的多孔压电填料通过冷冻干燥的方法制备聚乙烯吡咯烷酮，然后将聚二甲基硅氧烷（PDMS）填充到压电陶瓷的微孔中，以均匀分布的无机压电材料形成独特的3D互连结构。掺杂和结构修改都可以提高基于BTO的PENG的输出性能，合理的掺杂从中起主要作用，以提高当前PENG系统的电输出。为了实现完全柔性的压电纳米发电机（PENG），采用与PDMS集成的银纳米线网络作为柔性电极，该柔性电极是通过将真空过滤与随后的干转移过程相结合的技术制成的。PENG可以提供39 V的最大开路电压（V _OC）和短路（I _SC）在35 N的垂直力下于2 Hz时的电流为2.9μA，最大瞬时功率为24.2μW。而且，无论何时受到外部压力或弯曲应力，该装置都能有效地显示电输出信号。PENG在垂直压应力下的输出性能高于弯曲应力，这也得到COMSOL仿真的证实。PENG不仅可以用来收获生物机械能，例如数字关节运动，而且还具有触觉感知的潜力。这项工作借助柔性PENG在无铅陶瓷和可穿戴模拟触摸接收传感器之间建立了深厚的联系，这将为柔性电子产品描绘出一幅壮丽的图画。