Octopus tentacles inspired triboelectric nanogenerators for harvesting mechanical energy from highly wetted surface
Octopus tentacles inspired triboelectric nanogenerators for harvesting mechanical energy from highly wetted surface
复制标题
章鱼触手启发摩擦纳米发电机从高度湿润的表面收集机械能
DOI：
10.1016/j.nanoen.2019.03.068
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发表时间：
2019-06
期刊：
影响因子：
17.6
通讯作者：
Li Yufang
中科院分区：
文献类型：
--
作者：
Qian Yu;Nie Jinhui;Ma Xiu;Ren Zewei;Tian Jingwen;Chen Jieyi;Shen Honglie;Chen Xiangyu;Li Yufang
由于水的屏蔽作用，摩擦电纳米发电机(TEN)在高湿度环境下很难获得能量。腾腾在大气湿度下的热阻已经得到了大量的研究，而腾腾在高湿甚至含水表面的发能还没有得到深入的研究。因此，我们提出了一种章鱼触角启发的滕氏界面微图案，它可以提供两种功能。摩擦带电界面上的蜂窝状微图案可以在高湿条件下保持能量的产生，而水凝胶表面类似的图案也可以在含水的衬底上获得良好的粘附性。蜂窝状微图案的接触界面可以在挤压运动中方便排水，从而增加带电的有效接触面积。具有花纹摩擦表面的Teng在高湿表面上的开路电压可达78 V，是平面器件的两倍。另一方面，在坚韧的PA水凝胶表面也应用了类似的蜂窝状微图案。因此，制备了一种具有可重复粘接能力的水凝胶基Teng，使Teng器件能够附着在含水基材上，并收集水波能量。这种蜂窝状微图案界面的设计理念在含水环境和水波能量收集过程中具有良好的适用性，提高了设备的可用性，促进了其实际应用。
It is difficult for triboelectric nanogenerators (TENG) to harvest energy with high humidity environments, due to the screening effect of water. The resistance of TENG with atmosphere humidity has been studied by many previous works, while the energy generation of TENG on highly wetted or even water-bearing surface has not been thoroughly studied. Hence, we propose an octopus tentacle inspired micro patterns on the interface of TENG, which can provide two kinds of functions. The honeycomb-shaped micro patterns on tribo-electrification interface can maintain the energy generation on highly wetted condition and the similar patterns on the hydrogel surface can also achieve good adhesive capability on water-bearing substrates. The contact interface with honeycomb-shaped micro patterns can facilitate the water drainage during the pressing motion, which can increase the effective contact area for electrification. The open-circuit voltage (Voc) of the TENG with patterned tribo surface can reach 78 V on highly wetted surface, which is two times higher than that of a planar device. On the other hand, the similar honeycomb-shaped micro patterns have been applied on the surface of tough PA hydrogel. Accordingly, a hydrogel based TENG with repeatable adhesive capability is prepared, which allows TENG device to be adhered on the water-bearing substrate and harvest water wave energy. The demonstrated designed concept of this honeycomb-shaped micro patterns interface has excellent applicability in water-bearing environment and water wave energy harvesting process, enhancing device usability and promoting its practical applications.
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