Abstract Flexible piezoelectric energy harvesting devices based on inorganic piezoelectric materials have attracted wide attention for their outstanding physical properties and potential applications. Different strategies, such as adding ductile elements, increasing sintering time, sintering in various atmospheres, mixing with organic compounds which usually is not only for piezoelectric materials, are also used to fabricate highly flexible devices. However, these methods always accompanied by a sharp reduction in piezoelectric performance, and then the sensitivity of the device will be reduced. Here, The flexible piezoelectric energy harvesting device by mixing Ce-doped barium titanate (BaTiO3, BTO) nanofibers with poly (vinylidene fluoride-trifluorethylene) [P(VDF-TrFE)] nanofibers is studied. Due to the introduction of P(VDF-TrFE) nanofibers, the device show high flexibility. The device with high output signal is obtained, since both fillers are piezoelectric materials. The results show that the output power density of the device fabricated by Ce-BTO/P(VDF-TrFE) composite nanofibers is about six times larger than the device obtained by P(VDF-TrFE) nanofibers. This proposed method is expected to provide reference for the development of future nanoscale piezoelectric-based energy harvesting devices and sensors.

中文翻译：

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用于压电器件的 Ce 掺杂 BaTiO3/P(VDF-TrFE) 纳米纤维柔性复合材料

摘要 基于无机压电材料的柔性压电能量收集装置因其优异的物理性能和潜在的应用而受到广泛关注。不同的策略，例如添加延展性元素、增加烧结时间、在各种气氛中烧结、与通常不仅用于压电材料的有机化合物混合，也用于制造高柔性器件。然而，这些方法总是伴随着压电性能的急剧下降，进而导致器件的灵敏度降低。在这里，研究了通过将掺 Ce 钛酸钡 (BaTiO3, BTO) 纳米纤维与聚（偏二氟乙烯-三氟乙烯）[P(VDF-TrFE)] 纳米纤维混合的柔性压电能量收集装置。由于引入了 P(VDF-TrFE) 纳米纤维，该设备显示出高度的灵活性。获得具有高输出信号的器件，因为两种填料都是压电材料。结果表明，Ce-BTO/P(VDF-TrFE)复合纳米纤维制备的器件的输出功率密度比P(VDF-TrFE)纳米纤维制备的器件大6倍左右。该方法有望为未来纳米级压电式能量收集装置和传感器的发展提供参考。