Department of Applied Physics, Chongqing University , Chongqing 400044, P.R. China.
ACS Appl Mater Interfaces. 2015 Jan 21;7(2):1275-83. doi: 10.1021/am507477y. Epub 2015 Jan 7.
Great attention has been paid to nanogenerators that harvest energy from ambient environments lately. In order to give considerable output current, most nanogenerators require high-velocity motion that in most cases can hardly be provided in our daily life. Here we report a notepad-like triboelectric generator (NTEG), which uses simple notepad-like structure to generate elastic deformation so as to turn a low-velocity kinetic energy into high-velocity kinetic energy through the conversion of elastic potential energy. Therefore, the NTEG can achieve high current output under low-velocity motion, which completely distinguishes it from tribogenerators previously reported. The factors that may affect the output performance are explored, including the number of slices, active length of slice, press speed, and vertical displacement. In addition, the working mechanism is systematically studied, indicating that the efficiency of the generator can be greatly enhanced by interconversion between kinetic energy and elastic potential energy. The short-circuit current, the open-circuit voltage, and power density are 205 μA and 470 V and 9.86 W/m(2), respectively, which is powerful enough to light up hundreds of light-emitting diodes (LEDs) and charge a commercial capacitor. Besides, NTEGs have been successfully applied to a self-powered door monitor.
最近，人们对从环境中获取能量的纳米发电机给予了极大的关注。为了产生可观的输出电流，大多数纳米发电机需要高速运动，而在大多数情况下，这种高速运动在我们的日常生活中很难提供。在这里，我们报告了一种类似笔记本的摩擦纳米发电机（NTEG），它使用简单的类似笔记本的结构来产生弹性变形，从而通过弹性势能的转换将低速动能转化为高速动能。因此，NTEG 可以在低速运动下实现高电流输出，这与以前报道的摩擦发电机完全不同。我们还探索了可能影响输出性能的因素，包括切片数量、切片的有效长度、按压速度和垂直位移。此外，我们还系统地研究了工作机制，表明通过动能和弹性势能之间的相互转换可以大大提高发电机的效率。该发电机的短路电流、开路电压和功率密度分别为 205μA、470V 和 9.86W/m²，足以点亮数百个发光二极管（LED）并给商业电容器充电。此外，NTEG 已成功应用于自供电门监控器。
