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通过对微改性聚偏氟乙烯及其具有高电输出的共聚物能量收集器进行模拟实现改进设计

Improved Design via Simulation of Micro-Modified PVDF and its Copolymer Energy Harvester with High Electrical Outputs.

作者信息

Liu Yizhi, Huang Ziyu, Liu Chen

机构信息

Harbin Institute of Technology, Department of Astronautic Science and Mechanics, Harbin 150001, China.

出版信息

Sensors (Basel). 2020 Oct 15;20(20):5834. doi: 10.3390/s20205834.

DOI:10.3390/s20205834
PMID:33076384
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7602673/
Abstract

In this work, micro-modified polyvinylidene fluoride (PVDF) and its copolymer poly(vinylidene-trifluoroethylene) (P(VDF-TrFE)) with salient enhancement in current output are demonstrated. The influence of surface-modified structure characteristics on electrical properties of energy harvester is systematically analyzed based on the finite element method. For vertical load mode, eight structures consisting of banded and disjunctive groups are compared to evaluate the voltage performance. The cylinder is proved to be the best structure of 3.25 V, compared to the pristine structure of 0.99 V (P(VDF-TrFE)). The relevant experiment has been done to verify the simulation. The relationship between radius, height, force and distance to the voltage output of the cylinder allocation is discussed. For periodical changing load mode, the cylinder modified structure shows a conspicuous enhancement in current output. The suitable resistance, current-voltage and frequency, the relationship between loading speed and current, and the ductility of current loading are studied. For 30 kHz, the peak current is 20 times larger than the flat plate structure. Tip shape mode and fusiform shape mode are found, which show the different shapes of the peak current-frequency curves. Four electrical loading circuit properties are also discussed: the suitable resistance of the system, synchronism of current and voltage, time delay nature of energy harvester and current-loading relationship. The simulation results can provide some theoretical basis for designing the energy harvester and piezoelectric nanogenerator (PENG).

摘要

在这项工作中，展示了微改性聚偏氟乙烯（PVDF）及其共聚物聚（偏氟乙烯 - 三氟乙烯）（P（VDF - TrFE）），其电流输出有显著增强。基于有限元方法，系统地分析了表面改性结构特征对能量收集器电学性能的影响。对于垂直负载模式，比较了由带状和间断组组成的八种结构，以评估电压性能。与原始结构的0.99 V（P（VDF - TrFE））相比，圆柱结构被证明是最佳结构，电压为3.25 V。已经进行了相关实验来验证模拟。讨论了圆柱结构的半径、高度、力和到电压输出的距离之间的关系。对于周期性变化负载模式，圆柱改性结构在电流输出方面有显著增强。研究了合适的电阻、电流 - 电压和频率、负载速度与电流之间的关系以及电流负载的延展性。对于30 kHz，峰值电流比平板结构大20倍。发现了尖端形状模式和梭形形状模式，它们显示了峰值电流 - 频率曲线的不同形状。还讨论了四种电负载电路特性：系统的合适电阻、电流和电压的同步性、能量收集器的时间延迟特性以及电流 - 负载关系。模拟结果可为能量收集器和压电纳米发电机（PENG）的设计提供一些理论依据。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/c52d4aa43669/sensors-20-05834-g014.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/7ca7e7c813b8/sensors-20-05834-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/1949fbddacd5/sensors-20-05834-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/53335b825e34/sensors-20-05834-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/8740854e3941/sensors-20-05834-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/88f71773115b/sensors-20-05834-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/c52d4aa43669/sensors-20-05834-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/6b406dda7d88/sensors-20-05834-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/83baca53b3cc/sensors-20-05834-g004.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/0b54c1d69541/sensors-20-05834-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/7ca7e7c813b8/sensors-20-05834-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/1949fbddacd5/sensors-20-05834-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/53335b825e34/sensors-20-05834-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/8740854e3941/sensors-20-05834-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/fcbf278a03b1/sensors-20-05834-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/88f71773115b/sensors-20-05834-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6219/7602673/c52d4aa43669/sensors-20-05834-g014.jpg

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