Measuring Piezoelectric Output-Fact or Friction?,Advanced Materials

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Measuring Piezoelectric Output-Fact or Friction?
Advanced Materials ( IF 27.4 ) Pub Date : 2020-07-06 , DOI: 10.1002/adma.202002979
Andris Šutka ₁ , Peter C Sherrell ₂ , Nick A Shepelin ₂ , Linards Lapčinskis ₁ , Kaspars Mālnieks ₁ , Amanda V Ellis ₂

Affiliation

Piezoelectric polymers are emerging as exceptionally promising materials for energy harvesting. While the theoretical figures of merit for piezoelectric polymers are comparable to ceramics, the measurement techniques need to be retrofitted to account for the different mechanical properties of the softer polymeric materials. Here, how contact electrification, including friction and contact separation, is often mistaken for piezoelectric charge is examined, and a perspective for how to separate these effects is provided. The state of the literature is assessed, and recommendations are made for clear and simple guidelines in reporting, for both sample geometry and testing methods, to enable accurate determination of piezoelectric figures of merit in polymers. Such improvements will allow an understanding of what types of material manipulation are required in order to enhance the piezoelectric output from polymers and enable the next generation of polymer energy harvester design.

中文翻译：

测量压电输出因素还是摩擦？

压电聚合物正在成为非常有前途的能量收集材料。虽然压电聚合物的理论品质因数与陶瓷相当，但需要改进测量技术以考虑较软聚合物材料的不同机械性能。在这里，检查了接触带电（包括摩擦和接触分离）如何经常被误认为压电电荷，并提供了如何分离这些影响的观点。评估了文献的状态，并针对样品几何形状和测试方法在报告中提出了清晰和简单的指南建议，以准确确定聚合物中的压电品质因数。

更新日期：2020-08-11

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