As a permanent power source for self-powered electronics, piezoelectric energy harvesters (PEHs), which convert waste mechanical energy into electrical energy, have attracted considerable interest. We herein developed a high-performance PEH by employing a piezoelectric BaTiO₃ microclusters (MCs) composite and a ZnSnO₃ microspheres (MSs)-based pressure concentrator. The piezoelectric composite film and an embossed pressure concentrator were fabricated by optimized bar-coating and unidirectional rubbing processes, respectively. The final energy device, fabricated by stacking a ZnSnO₃ MSs-based embossed pressure concentrator onto a BaTiO₃ MCs-based piezoelectric composite, harvested output signals of ∼206 V and ∼24 μA under an applied pressure of 0.27 MPa, which are significantly improved results compared to previously reported composite-type PEHs. Furthermore, multiphysics-based finite element analysis was performed to support the hypothesis of effective piezo-potential distribution by adopting the BaTiO₃ MCs embedded in polymeric matrix and attaching the ZnSnO₃ MSs-monolayer onto the piezoelectric composite. This technology represents a new approach with significant advantages for fabricating high-output composite-based PEHs.

作为自供电电子设备的永久电源，将废机械能转化为电能的压电能量收集器（PEH）引起了人们的极大兴趣。我们在这里通过采用压电BaTiO ₃微团簇（MCs）复合材料和基于ZnSnO ₃微球（MSs）的压力集中器开发了高性能PEH 。通过优化的棒涂和单向摩擦工艺分别制造了压电复合膜和压纹压力浓缩器。通过将基于ZnSnO ₃ MSs的压花压力浓缩器堆叠到BaTiO ₃上而制造的最终能量设备基于MCs的压电复合材料，在0.27 MPa的施加压力下，获得了〜206 V和〜24μA的输出信号，与以前报道的复合型PEHs相比，这些信号得到了显着改善。此外，进行了基于多物理场的有限元分析，通过采用嵌入聚合物基体中的BaTiO ₃ MC并将ZnSnO ₃ MSs单层附着到压电复合材料上来支持有效压电势分布的假设。该技术代表了一种新方法，具有制造高输出复合材料PEH的显着优势。