Self-powered motion sensors have drawn many attentions for the last decade because it can be usefully applied to not only smart clothing and biomedical applications but also future remote controlling robotics systems. In this study, we develop a ceramic–polymer hybrid lead-free piezoelectric composite-based device to fabricate excellent flexible energy harvesters and kinetic motion sensing gloves. With the use of a composite composed of (K,Na)NbO₃ (KNN) piezoelectric particles and poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] matrix, the fabricated flexible energy harvester generates an open-circuit voltage of ~5 V and short-circuit current of ~1 μA under mechanical bending deformations. Moreover, the advantages of the P(VDF-TrFE) matrix for piezoelectric composite-based devices are validated by the results of the finite element method (FEM) simulation. Based on the hybrid piezoelectric composite, stable and reliable self-powered kinetic motion sensors are fabricated to monitor tiny biomechanical motions, i.e., the angles of finger hinges and various hand gestures. Our development successfully indicates that the hybrid lead-free piezoelectric composite can be applied to the active component of self-powered kinetic sensors for future low-power electronic motion detector.

在过去的十年中，自供电运动传感器吸引了很多关注，因为它不仅可以有效地应用于智能服装和生物医学应用，而且还可以应用于未来的远程控制机器人系统。在这项研究中，我们开发了一种陶瓷-聚合物混合无铅压电复合材料基器件，以制造出色的柔性能量收集器和动感传感手套。使用由（K，Na）NbO ₃组成的复合材料（KNN）压电颗粒和聚偏二氟乙烯-三氟乙烯[P（VDF-TrFE）]基体，制造的柔性能量收集器在机械弯曲下产生的开路电压约为5 V，短路电流约为1μA变形。此外，P（VDF-TrFE）矩阵对于基于压电复合材料的器件的优势已通过有限元方法（FEM）仿真的结果得到验证。基于混合压电复合材料，制造出稳定可靠的自供电运动传感器，以监测微小的生物力学运动，即手指铰链的角度和各种手势。我们的发展成功表明，该混合无铅压电复合材料可应用于自供电动力传感器的有源组件，以用于未来的低功耗电子运动检测器。