Direct-Write Piezoelectric Polymeric Nanogenerator with High Energy Conversion Efficiency
Direct-Write Piezoelectric Polymeric Nanogenerator with High Energy Conversion Efficiency
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高能量转换效率的直写式压电聚合物纳米发电机
DOI：
10.1021/nl9040719
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发表时间：
2010-02-01
期刊：
影响因子：
10.8
通讯作者：
Lin, Liwei
中科院分区：
文献类型：
--
作者：
Chang, Chieh;Tran, Van H.;Lin, Liwei
纳米发电机能够利用低成本、非半导体的有机纳米材料高效地将能量从机械源转化为电能，在包括能源收集器在内的许多应用中都具有吸引力。在这项工作中，近场电纺被用来直接写入具有原位机械拉伸和电极化特性的聚偏氟乙烯(PVDF)纳米纤维，以产生压电性能。在机械拉伸下，纳米发电机显示出可重复和稳定的电输出，其能量转换效率比PVDF薄膜高出一个数量级。早期的非线性磁区壁运动行为被认为是纳米纤维具有明显的高压电性的一种机制，这使得纳米纤维在传感和驱动应用方面具有潜在的优势。
Nanogenerators capable of converting energy from mechanical sources to electricity with high effective efficiency using low-cost, nonsemiconducting, organic nanomaterials are attractive for many applications, including energy harvesters. In this work, near-field electrospinning is used to direct-write poly(vinylidene fluoride) (PVDF) nanofibers with in situ mechanical stretch and electrical poling characteristics to produce piezoelectric properties. Under mechanical stretching, nanogenerators have shown repeatable and consistent electrical outputs with energy conversion efficiency an order of magnitude higher than those made of PVDF thin films. The early onset of the nonlinear domain wall motions behavior has been identified as one mechanism responsible for the apparent high piezoelectricity in nanofibers, rendering them potentially advantageous for sensing and actuation applications.