Cam-based sustainable triboelectric nanogenerators with a resolution-free 3D-printed system
Cam-based sustainable triboelectric nanogenerators with a resolution-free 3D-printed system
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DOI：
10.1016/j.nanoen.2017.06.015
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发表时间：
2017-08-01
期刊：
影响因子：
17.6
通讯作者：
Choi, Dukhyun
中科院分区：
文献类型：
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作者：
Lee, Younghoon;Kim, Wook;Choi, Dukhyun
我们环境中丰富的旋转能量可以利用机械能收集器来发电；然而，由于操作材料之间的严重摩擦和精确系统分辨率的必要性，旋转扫气器的使用寿命低，成本高。在这项研究中，我们报告了基于凸轮的摩擦电纳米发电机（c - teng），其中凸轮将旋转运动转化为线性运动，从而产生了一种实际可持续的高性能清除剂，该清除剂利用接触型teng。此外，我们在C-TENG系统中使用缓冲器弹簧来创建具有成本效益和无分辨率的C-TENG，这使得低分辨率的系统元件（即3d打印组件）可以轻松旋转而不会遇到阻塞。结果表明，间隔弹簧与缓冲器弹簧的弹性常数之比是提高C-TENG输出功率的重要设计变量。有趣的是，我们还发现，采用软基板可以显著提高接触材料下方支撑基板的刚度，并将TENGs的输出性能提高两倍以上。通过增加凸轮鼻数，工作频率增加，但由于C-TENG的接触速度相同，输出峰值功率没有变化。另外，C-TENG的输出功率非常依赖于角速度，其中接触速度显着增加。我们认为可以通过分析C-TENG中的分离时间来确定接触速度；这是有用的，因为很难直接测量速度。我们的C-TENG被证明可以在400 rpm的转速下长时间（超过210,000个周期）产生均匀的高输出电压（类似于350 V）。我们的C-TENG在15mo时的最大输出能量和平均功率分别为6.7 mu J和3.5 mW。C-TENG实际用于为自行车上的180个商用绿色发光二极管（led）供电。我们期望这种可持续的、无分辨率的3d打印系统设计将成为一种实用的、有前途的解决方案，用于TENGs的工业应用。
Abundant rotating energies in our environment could be utilized to produce electrical power by using mechanical energy harvesters; however, rotating scavengers are limited by their low lifetimes and high costs due to the severe friction between operating materials and the necessity of precise system resolution. In this study, we report cam-based triboelectric nanogenerators (C-TENGs), where the cam transforms rotational motion into linear movement, resulting in a practically-sustainable high-performance scavenger that utilizes contact-type TENGs. Furthermore, we use bumper springs in the C-TENG system to create cost-effective and resolution-free C-TENGs, which allow the low-resolution system elements (i.e., 3D-printed components) to be easily rotated without experiencing blocking. It is demonstrated that the ratio between the spring constants of a spacer spring and a bumper spring is an important design variable to improve the output power of the C-TENG. Interestingly, we also find that the rigidity of the supporting substrate below the contacting materials is significant and enhance the output performance of TENGs over twice by adopting soft substrates. By augmenting the number of cam noses, the working frequency increases, but the output peak power is not changed due to the same contact velocity in the C-TENG. Alternatively, the output power in the C-TENG is extremely dependent on the angular velocity where the contact velocity significantly increases. We suggest that the contact velocity could be determined by analyzing the separation time in the C-TENG; this is useful because it is difficult to directly measure the velocity. Our C-TENG is demonstrated to produce a uniform high output voltage (similar to 350 V) for a long time (over 210,000 cycles) at 400 rpm. The maximum output energy and average power of our C-TENG are calculated to be 6.7 mu J and 3.5 mW at 15 MO, respectively. The C-TENG is practically used to power 180 commercial green light-emitting diodes (LEDs) with a bicycle. We expect that this sustainable and resolution-free 3D-printed system design will be a practical and promising solution for industrial applications of TENGs.