NDLI: Energy harvesting from pavement via polyvinylidene fluoride: hybrid piezo-pyroelectric effects

Content Provider	Springer Nature Link
Author	Tao, Junliang Hu, Jie
Copyright Year	2016
Abstract	In the USA, there are over 4 million miles (6 million km) of roadways and more than 250 million registered vehicles. Energy lost in the pavement system due to traffic-induced vibration and deformation is enormous. If effectively harvested, such energy can serve as an alternative sustainable energy source that can be easily integrated into the transportation system. It is well known that most piezoelectric materials are also pyroelectric materials, which convert temperature change into electricity. However, the potential of polyvinylidene fluoride (PVDF) as a hybrid piezo-pyroelectric energy harvester has been seldom studied. The uniqueness of this study lies in that the electrical responses of PVDF under coupled mechanical and thermal stimulations are investigated. Through a series of well controlled experiments, it is found that there exists an interesting coupling phenomenon between piezoelectric and pyroelectric effects of PVDF: the voltage generated by simultaneous mechanical and thermal stimulations is the algebraic sum of voltages generated by separate stimulations. This means that there is neither strengthening nor weakening coupling effect when the piezoelectric and pyroelectric phenomena are coupled. This also makes the modeling process of the hybrid piezoelectric and pyroelectric effect straightforward. An estimation of power generation through piezoelectric and pyroelectric effect is conducted, and the overall effects of temperature on hybrid piezo-pyroelectric energy harvesting are discussed.研究聚偏氟乙烯的混合压电-热释电效应;评估混合压电-热释电效应在路面能量收集中的潜力。首次实验验证了混合压电-热释电效应可视为压电效应和热释电效应的代数总和,即压电效应和热释电效应相对独立,既不相互压制也不相互促进。通过分别控制机械荷载和热荷载,实验测定聚偏氟乙烯压电效应、热释电效应及混合压电-热释电效应(图1 和2);根据实地交通量和气温变化,通过简化的混合压电-热释电能量收集解析模型,估算美国俄亥俄州东北部地区路面能量收集的潜力(图4)。混合压电-热释电效应可视为压电效应和热释电效应的代数总和;在聚偏氟乙烯路面能量收集的建模中应该同时考虑压电效应和热释电效应;以本文中所选地区和材料为例,热释电效应弱于压电效应;混合压电-热释电效应能量收集效率的提高有望通过新型的纳米复合材料实现。
Starting Page	502
Ending Page	511
Page Count	10
File Format	PDF
ISSN	1673565X
Journal	Journal of Zhejiang University SCIENCE A
Volume Number	17
Issue Number	7
e-ISSN	18621775
Language	Chinese
Publisher	Zhejiang University Press
Publisher Date	2016-07-14
Publisher Place	Hangzhou
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Energy harvesting Pavement Piezoelectric Pyroelectric Hybrid Mechanical Engineering Civil Engineering Classical and Continuum Physics Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Engineering

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