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首页> 外文期刊>Nanotechnology >A large piezoelectric response in highly-aligned electrospun poly(vinylidene fluoride/trifluoroethylene) nanofiber webs for wearable energy harvesting
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A large piezoelectric response in highly-aligned electrospun poly(vinylidene fluoride/trifluoroethylene) nanofiber webs for wearable energy harvesting

机译：高度排列的电纺 - 聚（偏二氟乙烯/三氟乙烯）纳米纤维网的大型压电响应，可穿戴能量收集

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摘要

In this study, highly-aligned and molecularly oriented poly(vinylidene fluoride/trifluoroethylene) [P(VDF/TrFE)] nanofiber webs were fabricated and their piezoelectric response was investigated. Using systematic post-treatments under appropriate conditions, a significant enhancement of the piezoelectric response in the P(VDF/TrFE) nanofiber webs was observed for the first time. The high-quality nanofibers exhibited a large output voltage of 0.4 V. The short-circuit current of post-treated nanofibers was found to be 731.25 mu A, which increased about 330 times and the surface electric charge density was found to be 0.64 nC cm(-2), which was about 2.7 times higher than those of the as-spun nanofibers. The large enhancement of piezoelectric response of the nanofibers is attributed to the additional stretching, annealing and poling of the as-spun nanofibers under the appropriate post-treatment conditions. The results highlight the potential of the high-quality P(VDF/TrFE) nanofibers to be used as wearable piezoelectric energy harvesters and other flexible self-powered portable devices.
机译：本研究制备了高度取向和分子取向的聚偏氟乙烯/三氟乙烯[P（VDF/TrFE）]纳米纤维网，并对其压电响应进行了研究。通过在适当条件下进行系统的后处理，首次观察到P（VDF/TrFE）纳米纤维网的压电响应显著增强。高质量的纳米纤维显示出0.4V的大输出电压。后处理纳米纤维的短路电流为731.25μa，增加了约330倍，表面电荷密度为0.64 nC cm（-2），约为纺丝纳米纤维的2.7倍。纳米纤维压电响应的大幅增强归因于在适当的后处理条件下，初生纳米纤维的额外拉伸、退火和极化。研究结果突出了高质量P（VDF/TrFE）纳米纤维作为可穿戴压电能量采集器和其他灵活的自供电便携式设备的潜力。

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