Cantilever-based ferroelectret energy harvesting
Cantilever-based ferroelectret energy harvesting
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DOI：
10.1063/5.0006620
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发表时间：
2020-06-15
影响因子：
4
通讯作者：
Kupnik, M.
中科院分区：
文献类型：
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作者：
Ben Dali, O.;Pondrom, P.;Kupnik, M.
我们提出了一种振动能量收集器，其采用氟化乙烯丙烯 (FEP) 铁电驻极体，以 d(31) 模式工作。铁电驻极体薄膜由两层 FEP 薄膜组成，熔合在一起形成具有明确气隙的平行隧道结构。其动态压电g(31)系数为0.7VmN-1。能量收集装置是一种通过增材制造技术生产的空气间隔悬臂布置。通过将设备暴露于由振动器产生的加速度为 a 的正弦振动来测试该设备。测量结果显示，对于 4.5g 的地震质量、加速度为 0.1g（g 是地球重力）的情况，谐振频率约为 35Hz，归一化输出功率为 320μW。这证明了铁电驻极体在空气间隔振动能量收集方面的显着改进，并且大大超过了聚合物悬臂装置之前的性能数据。
We present a vibrational energy harvester with fluorinated ethylene propylene (FEP)-ferroelectrets working in d(31) mode. The ferroelectret film consists of two FEP films, fused together to form a parallel tunnel structure with well-defined air gaps. Its dynamic piezoelectric g(31) coefficient is0.7VmN- 1. The energy-harvesting device is an air-spaced cantilever arrangement that was produced by the additive manufacturing technique. The device was tested by exposing it to sinusoidal vibrations with an acceleration a, generated by a shaker. The measurement shows a resonance at about 35Hz and a normalized output power of 320 mu W for a seismic mass of 4.5g at an acceleration of 0.1g (g is the gravity of the earth). This demonstrates a significant improvement of air-spaced vibrational energy harvesting with ferroelectrets and greatly exceeds previous performance data for polymer cantilever devices.