Flexible piezoelectric nano-composite films for kinetic energy harvesting from textiles
Flexible piezoelectric nano-composite films for kinetic energy harvesting from textiles
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DOI：
10.1016/j.nanoen.2017.01.037
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发表时间：
2017-03-01
期刊：
影响因子：
17.6
通讯作者：
Beeby, Steve
中科院分区：
文献类型：
--
作者：
Almusallam, Ahmed;Luo, Zhenhua;Beeby, Steve
本文详细介绍了增强的介电和压电性能的低温丝网印刷压电纳米复合薄膜上的柔性塑料和纺织品基板。这些增强包括将银纳米颗粒添加到纳米复合材料中，并使用额外的冷等静压（CIP）后处理程序。这些发展导致独立压电充电系数d（33）增加18%，达到98 pC/N的值。然而，压电膜的介电常数的增加导致了复合膜的峰值输出电压的降低。已经从理论和实验上评估了这种材料用于在压缩力和弯曲力下从各种纺织品中获取机械能的潜力。在Kermel织物上，发现在800 N压缩力下增强的压电材料的最大能量密度为34 J/m（3）。在弯曲下的增强压电材料的最大能量密度被发现是14.3 J/m3的棉纺织品。这些结果与理论预测非常吻合。对于100 μ m厚的10 × 10 cm压电元件，这分别等于每个机械动作产生的38 μ J和14.3 μ J的能量，这是潜在有用的能量量。
This paper details the enhancements in the dielectric and piezoelectric properties of a low-temperature screenprintable piezoelectric nano-composite film on flexible plastic and textile substrates. These enhancements involved adding silver nano particles to the nano-composite material and using an additional cold isostatic pressing (CIP) post-processing procedure. These developments have resulted in a 18% increase in the freestanding piezoelectric charge coefficient d(33) to a value of 98 pC/N. The increase in the dielectric constant of the piezoelectric film has, however, resulted in a decrease in the peak output voltage of the composite film. The potential for this material to be used to harvest mechanical energy from a variety of textiles under compressive and bending forces has been evaluated theoretically and experimentally. The maximum energy density of the enhanced piezoelectric material under 800 N compressive force was found to be 34 J/m(3) on a Kermel textile. The maximum energy density of the enhanced piezoelectric material under bending was found to be 14.3 J/m3 on a cotton textile. These results agree very favourably with the theoretical predictions. For a 10x10 cm piezoelectric element 100 mu m thick this equates to 38 mu J and 14.3 mu J of energy generated per mechanical action respectively which is a potentially useful amount of energy.