PVDF-HFP+IL复合材料的离子扩散率和烷基链长度相关的摩擦电行为

Sujeong Gwak , Hyeonseo Joo , Bonhyeop Koo , Cheoljae Lee , Hyosik Park , Hochun Lee , Ju-Hyuck Lee
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引用次数: 0

摘要

随着全球对可再生能源和清洁能源需求的增长,摩擦纳米发电机(TENGs)已经成为一种很有前途的机械能收集技术。在此背景下,我们的研究重点是将离子液体(ILs)加入聚偏氟乙烯-共六氟丙烯(PVDF-HFP)中,以探索ILs的烷基链长度如何影响摩擦电极性。采用含双(三氟甲基磺酰)亚胺(TFSI⁻)阴离子的咪唑类il +,其中阳离子如1-乙基-3-甲基咪唑(EMIM +)和1-丁基-3-甲基咪唑(BMIM +)表现出三正性,而烷基链较长的il +,如1-甲基-3-正辛基咪唑(OMIM +)和1-十二烷基-3-甲基咪唑(DoMIM +)则表现出三负性。这些趋势与il的自扩散系数测量值相关。通过掺入IL对摩擦电行为的控制和双电层(EDL)的形成显著提高了表面电荷密度,从而改善了teng的输出性能。这项工作为提高TENG效率提供了一种新的策略,并为可持续能源应用提供了材料选择指南。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Ion diffusivity and alkyl chain length-dependent triboelectric behavior of PVDF-HFP+IL composites

Ion diffusivity and alkyl chain length-dependent triboelectric behavior of PVDF-HFP+IL composites
As the global demand for renewable and clean energy solutions grows, triboelectric nanogenerators (TENGs) have emerged as a promising technology for harvesting mechanical energy. In this context, our study focuses on incorporating ionic liquids (ILs) into poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) to explore how the alkyl chain length of ILs influences triboelectric polarity. Imidazolium-based ILs containing bis(trifluoromethylsulfonyl)imide (TFSI⁻) anions were used, with cations such as 1-ethyl-3-methylimidazolium (EMIM⁺) and 1-butyl-3-methylimidazolium (BMIM⁺) exhibiting tribo-positive characteristics, while those with longer alkyl chains, including 1-methyl-3-n-octylimidazolium (OMIM⁺) and 1-dodecyl-3-methylimidazolium (DoMIM⁺), displayed tribo-negative behavior. These trends were correlated with self-diffusion coefficient measurements of the ILs. The control of triboelectric behavior and the formation of an electric double layer (EDL) through IL incorporation significantly enhanced the surface charge density, thereby improving the output performance of TENGs. This work provides a novel strategy for enhancing TENG efficiency and offers material selection guidelines for sustainable energy applications.
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