文献类型：期刊文献

英文题名：Recent Advances in Ferroelectret Fabrication, Performance Optimization, and Applications

作者：Wang, Ningzhen[1];Zhang, He[1];Qiu, Xunlin[2];Gerhard, Reimund[3];van Turnhout, Jan[4];Cressotti, Jason[5];Zhao, Dong[1];Tang, Liang[1];Cao, Yang[5]

机构：[1]Beijing Forestry Univ, Sch Technol, Beijing 100083, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai Key Lab Intelligent Sensing & Detect Tech, Shanghai 200237, Peoples R China;[3]Univ Potsdam, Inst Phys & Astron, Fac Sci, D-14476 Potsdam Golm, Germany;[4]Delft Univ Technol, Dept Mat Sci Engn, NL-2628 CD Delft, Netherlands;[5]Univ Connecticut, Inst Mat Sci, Elect Insulat Res Ctr, Storrs, CT 06269 USA

年份：2024

卷号：36

期号：52

外文期刊名：ADVANCED MATERIALS

收录：;EI(收录号：20242216188525);WOS:【SCI-EXPANDED(收录号:WOS:001232466200001)】；

基金：N.W., H.Z., and X.Q. contributed equally to this work. N.W., H.Z., X.Q., D.Z., and L.T. would like to acknowledge the funding support by the National Natural Science Foundation of China (Grant No. 12174102) and the Key Laboratory of Advanced Materials of Ministry of Education, China (No. AdvMat-2023-16).

语种：英文

外文关键词：charging mechanisms; energy harvesters; ferroelectrets; piezoelectric models; wearable technology

摘要：The growing demand for wearable devices has sparked a significant interest in ferroelectret films. They possess flexibility and exceptional piezoelectric properties due to strong macroscopic dipoles formed by charges trapped at the interface of their internal cavities. This review of ferroelectrets focuses on the latest progress in fabrication techniques for high temperature resistant ferroelectrets with regular and engineered cavities, strategies for optimizing their piezoelectric performance, and novel applications. The charging mechanisms of bipolar and unipolar ferroelectrets with closed and open-cavity structures are explained first. Next, the preparation and piezoelectric behavior of ferroelectret films with closed, open, and regular cavity structures using various materials are discussed. Three widely used models for predicting the piezoelectric coefficients (d33) are outlined. Methods for enhancing the piezoelectric performance such as optimized cavity design, utilization of fabric electrodes, injection of additional ions, application of DC bias voltage, and synergy of foam structure and ferroelectric effect are illustrated. A variety of applications of ferroelectret films in acoustic devices, wearable monitors, pressure sensors, and energy harvesters are presented. Finally, the future development trends of ferroelectrets toward fabrication and performance optimization are summarized along with its potential for integration with intelligent systems and large-scale preparation. Ferroelectrets demonstrate remarkable flexibility and piezoelectricity attributed to the formation of macrodipoles within the internal cavities of porous dielectric films upon polarization. This article provides a comprehensive review of ferroelectret fabrication techniques with different cavity structures, models for predicting piezoelectric coefficients, methods for enhancing performance, diverse applications, and future trends for large-scale preparation and integration with wearable systems. image