Fu Jing, Hou Yudong, Zheng Mupeng, Zhu Mankang
Key Laboratory of Advanced Functional Materials, Education Ministry of China, College of Materials Science and Engineering , Beijing University of Technology , Beijing 100124 , China.
ACS Appl Mater Interfaces. 2020 Feb 26;12(8):9766-9774. doi: 10.1021/acsami.9b21201. Epub 2020 Feb 14.
In order to achieve a high-performance flexible piezoelectric energy harvester (FPEH), a unique sandwich structure, that is, a PVDF film filled with FeTiNbO (FTN) semiconductor particles as an intermediate layer and a pure PVDF film as an upper and lower barrier layer, has been designed, and the corresponding PVDF-FTN/PVDF-PVDF (P-FTN-P) compact composite has been prepared by hot-pressing technology. The special sandwich structure combined with the introduction of FTN particles is beneficial to enhance the interfacial polarization and the content of the electroactive phase in PVDF. Together with the maximum piezoelectric voltage coefficient and the moderate Young's modulus, the P-FTN15%-P FPEH exhibited the optimal energy-harvesting performance with a high power density of 110 μW/cm and a large charge density of 75 μC/m in cantilever mode. The outstanding design in this work is expected to provide a new way for the development of high-performance FPEH materials.
为了实现高性能的柔性压电能量收集器（FPEH），设计了一种独特的三明治结构，即以填充有FeTiNbO（FTN）半导体颗粒的聚偏氟乙烯（PVDF）薄膜作为中间层，以纯PVDF薄膜作为上下阻挡层，并通过热压技术制备了相应的PVDF-FTN/PVDF-PVDF（P-FTN-P）致密复合材料。特殊的三明治结构与FTN颗粒的引入相结合，有利于增强PVDF中的界面极化和电活性相含量。连同最大压电电压系数和适度的杨氏模量，P-FTN15%-P FPEH在悬臂模式下表现出最佳的能量收集性能，具有110 μW/cm的高功率密度和75 μC/m的大电荷密度。这项工作中的出色设计有望为高性能FPEH材料的开发提供一条新途径。
