Direct-Write Piezoelectric Polymeric Nanogenerator with High Energy Conversion Efficiency

作者：Chieh Chang, Van Huong Tran, Junbo Wang, Yiin‐Kuen Fuh, Liwei Lin · 发表于：Nano Letters · 年份：2010 · DOI：10.1021/nl9040719 · 被引用次数：1374 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Conducting polymers and applications、Innovative Energy Harvesting Technologies

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.