A fully encapsulated piezoelectric–triboelectric hybrid nanogenerator for energy harvesting from biomechanical and environmental sources

eXPRESS Polymer Letters

C. Y. Chen¹ 

关键词: nanomaterials;    PTHG;    PVDF;    NMF;    NFES;   

DOI  :  10.3144/expresspolymlett.2019.45

学科分类：生物科学（综合）

来源: eXPRESS Polymer Letters

【 摘 要 】

In this paper, a hybrid nanogenerator with concurrently harvested piezoelectric and triboelectric mechanisms,called a fully encapsulated piezoelectric–triboelectric hybrid nanogenerator (PTHG), is demonstrated. In the constructionof piezoelectric nanogenerator (PENG), an in-situ poling near-field electrospinning (NFES) was utilized to direct-writepiezoelectric polymeric nano/micro fibers (NMFs) polyvinylidene fluoride (PVDF) as the functional layer of piezoelectricnanogenerators. On the other hand, the nano-textured functional layer of triboelectric nanogenerators (TENGs) is also concurrentlycombined with PENG. This hybridized nanogenerator was demonstrated to simultaneously harvest piezoelectricand triboelectric output such that the superimposed peak output voltage /current signals of ~130 V/4 μA at 2 Hz, which canbe translated to the area power density of 8.34 mW/m2. Individually measured TENG under a hand-induced strain 0.2 and2 Hz actuation, the output voltage/current peak is measured about 110 V/2.8 μA, while the PENG counterpart shows the theoutput voltage/current peak is about 18 V/0.6 μA. In addition, the proposed PTHG can harvest sustainable energy sourcessuch as rain water with the output maximum voltage reaches ~20 V and area power density ~0.981 mW/m2 for droppingrate of 10 ml/s. This research shows the substantial improvement in the synergy of nano-textured triboelectric and piezoelectricfunctional layers. The practical application of the self-powered system can be ubiquitously implemented in the sustainableenergy sources and future industry 4.0 scenarios to provide the stand alone energy sources of IoT sensors.

【 授权许可】

CC BY