Wu Qiupeng, Yu Zhiheng, Huang Fengli, Gu Jinmei
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
Key Laboratory of Advanced Manufacturing Technology of Jiaxing City, Jiaxing University, Jiaxing 341000, China.
Materials (Basel). 2022 Jul 26;15(15):5191. doi: 10.3390/ma15155191.
Triboelectric nanogenerators (TENGs) are considered to be the most promising energy supply equipment for wearable devices, due to their excellent portability and good mechanical properties. Nevertheless, low power generation efficiency, high fabrication difficulty, and poor wearability hinder their application in the wearable field. In this work, PA66/graphene fiber films with 0, 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt% graphene and PVDF films were prepared by electrospinning. Meanwhile, TENGs were prepared with PA66/graphene fiber films, PVDF films and plain weave conductive cloth, which were used as the positive friction layer, negative friction layer and the flexible substrate, respectively. The results demonstrated that TENGs prepared by PA66/graphene fiber films with 2 wt% grapheme showed the best performance, and that the maximum open circuit voltage and short circuit current of TENGs could reach 180 V and 7.8 μA, respectively, and that the power density was 2.67 W/m when the external load was 113 MΩ. This is why the PA66/graphene film produced a more subtle secondary network with the addition of graphene, used as a charge capture site to increase its surface charge. Additionally, all the layered structures of TENGs were composed of breathable electrospun films and plain conductive cloth, with water vapor transmittance (WVT) of 9.6 Kgmd, reflecting excellent wearing comfort. The study showed that TENGs, based on all electrospinning, have great potential in the field of wearable energy supply devices.
摩擦纳米发电机（TENGs）因其出色的便携性和良好的机械性能，被认为是可穿戴设备最具前景的能量供应设备。然而，低发电效率、高制造难度和较差的可穿戴性阻碍了它们在可穿戴领域的应用。在这项工作中，通过静电纺丝制备了含有0、1 wt%、1.5 wt%、2 wt%、2.5 wt%石墨烯的PA66/石墨烯纤维膜以及PVDF膜。同时，用PA66/石墨烯纤维膜、PVDF膜和平纹编织导电布制备了TENGs，它们分别用作正摩擦层、负摩擦层和柔性基底。结果表明，由含2 wt%石墨烯的PA66/石墨烯纤维膜制备的TENGs表现出最佳性能，TENGs的最大开路电压和短路电流分别可达180 V和7.8 μA，当外部负载为113 MΩ时，功率密度为2.67 W/m 。这是因为PA66/石墨烯膜在添加石墨烯后产生了更细微的二级网络，用作电荷捕获位点以增加其表面电荷。此外，TENGs的所有层状结构均由透气的静电纺丝膜和平纹导电布组成，水蒸气透过率（WVT）为9.6 Kgmd，体现出优异的穿着舒适性。该研究表明，基于全静电纺丝的TENGs在可穿戴能量供应设备领域具有巨大潜力。
