Flexible triboelectric generator!
Flexible triboelectric generator!
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DOI：
10.1016/j.nanoen.2012.01.004
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发表时间：
2012-03-01
期刊：
影响因子：
17.6
通讯作者：
Wang, Zhong Lin
中科院分区：
文献类型：
--
作者：
Fan, Feng-Ru;Tian, Zhong-Qun;Wang, Zhong Lin
摩擦电过程中产生的电荷在科学研究和技术应用中通常被认为是一种负效应，在很多情况下是一种能量浪费。在这里，我们展示了一种简单，低成本和有效的方法，使用摩擦中的充电过程将机械能转换为驱动小型电子设备的电力。摩擦电发电机（TEG）通过堆叠由具有明显不同的摩擦电特性的材料制成的两个聚合物片来制造，其中金属膜沉积在组装结构的顶部和底部上。一旦受到机械变形，由于纳米级的表面粗糙度，两个膜之间的摩擦在两侧产生等量但符号相反的电荷。因此，在界面区域处形成摩擦电势层，如果系统的电容存在变化，该摩擦电势层用作电荷“泵”，用于驱动外部负载中的电子流动。这种柔性聚合物TEG在类似于10.4mW/cm（3）的功率密度下给出高达3.3V的输出电压。TEG具有从人类活动、旋转轮胎、海浪、机械振动等中收集能量的潜力，在个人电子产品、环境监测、医学科学甚至大规模电力的自供电系统中具有很大的应用。(C)2012爱思唯尔有限公司保留所有权利。
Charges induced in triboelectric process are usually referred as a negative effect either in scientific research or technological applications, and they are wasted energy in many cases. Here, we demonstrate a simple, low cost and effective approach of using the charging process in friction to convert mechanical energy into electric power for driving small electronics. The triboelectric generator (TEG) is fabricated by stacking two polymer sheets made of materials having distinctly different triboelectric characteristics, with metal films deposited on the top and bottom of the assembled structure. Once subjected to mechanical deformation, a friction between the two films, owing to the nano-scale surface roughness, generates equal amount but opposite signs of charges at two sides. Thus, a triboelectric potential layer is formed at the interface region, which serves as a charge "pump" for driving the flow of electrons in the external toad if there is a variation in the capacitance of the system. Such a flexible polymer TEG gives an output voltage of up to 3.3 V at a power density of similar to 10.4 mW/cm(3). TEGs have the potential of harvesting energy from human activities, rotating tires, ocean waves, mechanical vibration and more, with great applications in self-powered systems for personal electronics, environmental monitoring, medical science and even large-scale power. (C) 2012 Elsevier Ltd. All rights reserved.