The effective conversion of vibrational energy from the motion of human body into electricity has been considered as one of the most promising technologies for charging portable electronic devices. Here, we report an electric polarization-controlled PVDF-based hybrid triboelectric-piezoelectric nanogenerator (TP-NG) as for an effective energy harvesting of various mechanical vibrations from human foot. The hybrid TP-NG simply consists of PVDF, Al, and acrylic, and the triboelectric NG component is vertically stacked on the piezoelectric NG component. We observed the strong electric-polarization-dependent electric power due to the modulated surface potential and negative piezoelectricity of PVDF. We also observed the in-phase power generation due to the vertical stacking of two flat NGs, irrespective of various loading rate, contact time, force, and frequency. Three hybrid TP-NGs were embedded at the forefoot, arch, and heel positions in a shoe insole. During normal walking, the shoe insole generated sufficient power to operate light-emitting diodes, which could be used in lightning at night. In addition, the insole operated a wireless pressure network, which could be used in monitoring and transmitting the pressure distribution on the foot to a cellular phone. This work provides an important step in the harvesting of random and irregular vibrational energy from the human foot, and in the realization of self-powered lightning for safety and self-powered wireless pressure monitoring system for diagnostic healthcare.

将振动能从人体运动有效转换为电能已被认为是为便携式电子设备充电的最有前途的技术之一。在这里，我们报告了一种基于极化控制的PVDF的混合摩擦压电压电纳米发电机（TP-NG），用于从人脚有效收集各种机械振动。混合TP-NG仅由PVDF，Al和丙烯酸组成，并且摩擦电NG组件垂直堆叠在压电NG组件上。由于PVDF的调制表面电势和负压电性，我们观察到了与极化有关的强电力。我们还观察到由于两个扁平NG的垂直堆叠而产生的同相发电，而不管负载率，接触时间，受力，和频率。在鞋垫的前脚，足弓和脚后跟位置嵌入了三个混合式TP-NG。在正常的步行过程中，鞋垫会产生足够的功率来操作发光二极管，该发光二极管可在夜间用于闪电。另外，鞋垫操作了无线压力网络，该无线压力网络可用于监视脚上的压力分布并将其传输到手机。这项工作为从人脚中收集随机和不规则的振动能量，实现用于安全的自供电雷电和用于诊断医疗保健的自供电无线压力监测系统，提供了重要的一步。鞋垫产生的功率足以操作发光二极管，该发光二极管可在夜间用于闪电。另外，鞋垫操作了无线压力网络，该无线压力网络可用于监视脚上的压力分布并将其传输到手机。这项工作为从人脚中收集随机和不规则的振动能量，实现用于安全的自供电雷电和用于诊断医疗保健的自供电无线压力监测系统，提供了重要的一步。鞋垫产生的功率足以操作发光二极管，该发光二极管可在夜间用于闪电。另外，鞋垫操作了无线压力网络，该无线压力网络可用于监视脚上的压力分布并将其传输到手机。这项工作为从人脚中收集随机和不规则的振动能量，实现用于安全的自供电雷电和用于诊断医疗保健的自供电无线压力监测系统，提供了重要的一步。