Flexible piezoelectric nanogenerators using metal-doped ZnO-PVDF films
Flexible piezoelectric nanogenerators using metal-doped ZnO-PVDF films
复制标题
DOI：
10.1016/j.sna.2020.111912
复制
发表时间：
2020-04-15
影响因子：
4.6
通讯作者：
Zhang, John X. J.
中科院分区：
文献类型：
--
作者：
Jin, Congran;Hao, Nanjing;Zhang, John X. J.
压电纳米材料-聚合物复合材料代表了一种独特的范例，用于制造具有增强设备性能的灵活能量收集和传感设备。在这项工作中，我们研究了各种金属掺杂的ZnO纳米结构，制备和表征ZnO纳米颗粒-PVDF复合薄膜，并展示了增强的能量产生和运动传感能力。具体而言，一系列的柔性压电纳米发电机（PENG）的设计基于这些压电复合薄膜。分别研究和比较了钴（Co）、钠（Na）、银（Ag）和锂（Li）掺杂的ZnO-PVDF复合材料以及纯ZnO-PVDF样品的电压输出。在相同的实验条件下，Li-ZnO基器件产生的峰间电压最大（3.43Vpp），约为纯ZnO基器件的9倍，其中Co-ZnO、Na-ZnO和Ag-ZnO基器件分别为1.2，4.9和5.4倍。此外，还研究了Li-ZnO掺杂比例对输出电压的影响，发现掺杂比例为5%时输出电压最高。最后，我们证明了该设备从手指敲击中收集的能量可以以0.45 W/cm（3）的大输出功率密度为电容器充电，并点亮紫外线（UV）发光二极管（LED）。我们还展示了该设备作为一个灵活的可穿戴运动传感器，其中不同的手势检测设备具有独特的输出电压幅度和模式。(C)2020 Elsevier B. V.保留所有权利。
Piezoelectric nanomaterial-polymer composites represent a unique paradigm for making flexible energy harvesting and sensing devices with enhanced devices' performance. In this work, we studied various metal doped ZnO nanostructures, fabricated and characterized ZnO nanoparticle-PVDF composite thin film, and demonstrated both enhanced energy generation and motion sensing capabilities. Specifically, a series of flexible piezoelectric nanogenerators (PENGs) were designed based on these piezoelectric composite thin films. The voltage output from cobalt (Co), sodium (Na), silver (Ag), and lithium (Li) doped ZnO-PVDF composite as well as pure ZnO-PVDF samples were individually studied and compared. Under the same experimental conditions, the Li-ZnO based device produces the largest peak-to-peak voltage (3.43 Vpp) which is about 9 times of that of the pure ZnO based device, where Co-ZnO, Na-ZnO and Ag-ZnO are 1.2, 4.9 and 5.4 times, respectively. In addition, the effect of doping ratio of Li-ZnO is studied, and we found that 5 % is the best doping ratio in terms of output voltage. Finally, we demonstrated that the energy harvested by the device from finger tapping at similar to 2 Hz can charge a capacitor with a large output power density of 0.45 W/cm(3) and light up an ultraviolet (UV) light-emitting diode (LED). We also showed the device as a flexible wearable motion sensor, where different hand gestures were detected by the device with distinctive output voltage amplitudes and patterns. (C) 2020 Elsevier B.V. All rights reserved.