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An Ultrafast Self-Polarization Effect in Barium Titanate Filled Poly(Vinylidene Fluoride) Composite Film Enabled by Self-Charge Excitation Triboelectric Nanogenerator
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-06-22 , DOI: 10.1002/adfm.202204322 Jian Wang 1 , Huiyuan Wu 1 , Zhao Wang 1 , Wencong He 1 , Chuncai Shan 1 , Shaoke Fu 1 , Yan Du 1 , Hong Liu 2 , Chenguo Hu 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-06-22 , DOI: 10.1002/adfm.202204322 Jian Wang 1 , Huiyuan Wu 1 , Zhao Wang 1 , Wencong He 1 , Chuncai Shan 1 , Shaoke Fu 1 , Yan Du 1 , Hong Liu 2 , Chenguo Hu 1
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Although charge excitation is an effective approach to achieve high charge density for triboelectric nanogenerators (TENGs), high output charge is limited by air-breakdown. Due to capacitor structure, there are two ways to reduce the influence of air-breakdown in TENG: decrease in thickness and increase in permittivity of dielectric film. Obviously, the increase in permittivity is more reliable in applications. Herein, a double-layer TENG shared with one floating metal electrode is proposed, on which charge is injected by a self-excitation circuit. An ultrafast self-polarization effect is found in two barium titanate filled poly(vinylidene fluoride) composite films in the TENG by high electrical field produced from the floating electrode. According to comparison and analysis, the speed of polarization to saturation of dielectric composite films in self-charge excitation approach is ≈3 times faster than that of external-charge excitation. Optimization of various parameters is investigated to enhance the output performance of the TENG. A large output charge density of 1.67 mC m–2 is achieved in the atmosphere with 40% relative humidity due to self-polarization effect of the dielectric composite film. This study provides insights into understanding the polarized behavior of molecules in dielectrics and further optimizing the output performance of TENGs in self-charge excitation systems.
中文翻译：
自充电激发摩擦纳米发电机在钛酸钡填充聚偏二氟乙烯复合薄膜中的超快自极化效应
尽管电荷激发是实现摩擦纳米发电机（TENG）高电荷密度的有效方法，但高输出电荷受到空气击穿的限制。由于电容器结构的原因，有两种方法可以减少 TENG 中空气击穿的影响：减小厚度和增加介电膜的介电常数。显然，介电常数的增加在应用中更可靠。在此，提出了一种与一个浮动金属电极共享的双层 TENG，其上通过自激电路注入电荷。通过浮动电极产生的高电场，在 TENG 中的两个钛酸钡填充的聚偏二氟乙烯复合薄膜中发现了超快的自极化效应。根据对比分析，自充电激发方法中介电复合膜的极化到饱和的速度比外部电荷激发快约 3 倍。研究了各种参数的优化以提高 TENG 的输出性能。1.67 mC m 的大输出电荷密度由于介电复合膜的自极化效应，在相对湿度为 40% 的大气中实现了–2 。本研究为理解电介质中分子的极化行为和进一步优化自充电激发系统中 TENG 的输出性能提供了见解。
更新日期：2022-06-22
中文翻译：
自充电激发摩擦纳米发电机在钛酸钡填充聚偏二氟乙烯复合薄膜中的超快自极化效应
尽管电荷激发是实现摩擦纳米发电机（TENG）高电荷密度的有效方法，但高输出电荷受到空气击穿的限制。由于电容器结构的原因，有两种方法可以减少 TENG 中空气击穿的影响：减小厚度和增加介电膜的介电常数。显然，介电常数的增加在应用中更可靠。在此，提出了一种与一个浮动金属电极共享的双层 TENG，其上通过自激电路注入电荷。通过浮动电极产生的高电场，在 TENG 中的两个钛酸钡填充的聚偏二氟乙烯复合薄膜中发现了超快的自极化效应。根据对比分析，自充电激发方法中介电复合膜的极化到饱和的速度比外部电荷激发快约 3 倍。研究了各种参数的优化以提高 TENG 的输出性能。1.67 mC m 的大输出电荷密度由于介电复合膜的自极化效应，在相对湿度为 40% 的大气中实现了–2 。本研究为理解电介质中分子的极化行为和进一步优化自充电激发系统中 TENG 的输出性能提供了见解。
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