IF 11.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Shangsong Li, Yuchen Wang, Zixiao Liu, Baohong Chen, Mingzhu Liu, Ximin He, Shu Yang
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引用次数: 0

摘要

热释电材料可在温度变化时产生电荷,是可再生能源的重要组成部分。然而,目前的柔性热释电能量收集器存在输出功率低的问题。在此,我们提出了一种液晶弹性体(LCE)和热电性锆钛酸铅(PZT)纳米颗粒的纳米复合材料,并展示了一种具有高输出的柔性热能收集装置。施加在 LCE 上的热应力产生的二次热释电增强了整体热释电性。计算和模拟结果与实验结果相吻合,表明具有固定边界的单域 LCE/PZT 增强效果最佳。在每秒 0.20 开尔文的最大加热速率下,固定单域薄膜(PZT 重量百分比为 42.7)的输出电流为 2.81 纳安,电压为 6.23 伏特,热释电系数 p 为 -4.01 纳库仑/平方厘米/开尔文,比广泛使用的聚偏氟乙烯高 49%。我们的能量收集器可为电容器充电,并为发光二极管等电子设备供电。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Flexible pyroelectric energy harvesters from nanocomposites of liquid crystal elastomers/lead zirconate titanate nanoparticles
Pyroelectric materials that can generate electric charges when subjected to temperature changes are of interest for renewable energy. However, current flexible pyroelectric energy harvesters suffer from low output. Here, we present a nanocomposite of liquid crystalline elastomer (LCE) and pyroelectric lead zirconate titanate (PZT) nanoparticles and demonstrate a flexible heat harvesting device with high output. The overall pyroelectricity is enhanced by the secondary pyroelectricity generated from the thermal stress imposed on the LCE. Calculations and simulations corroborate with experiments, suggesting that the monodomain LCE/PZT with fixed boundaries offers the most enhancement. At a maximum heating rate of 0.20 kelvin per second, the fixed monodomain film (42.7 weight % PZT) shows an output current of 2.81 nanoamperes and a voltage of 6.23 volts, corresponding to a pyroelectric coefficient p of −4.01 nanocoulombs per square centimeter per kelvin, 49% higher than that of the widely used polyvinylidene fluoride. Our energy harvester can charge capacitors and power electronic devices such as light-emitting diodes.
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来源期刊
Science Advances
Science Advances 综合性期刊-综合性期刊
CiteScore
21.40
自引率
1.50%
发文量
1937
审稿时长
29 weeks
期刊介绍: Science Advances, an open-access journal by AAAS, publishes impactful research in diverse scientific areas. It aims for fair, fast, and expert peer review, providing freely accessible research to readers. Led by distinguished scientists, the journal supports AAAS's mission by extending Science magazine's capacity to identify and promote significant advances. Evolving digital publishing technologies play a crucial role in advancing AAAS's global mission for science communication and benefitting humankind.
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