通过梯度分层设计海岛结构增强全有机电介质的储能特性

IF 2.2 4区 化学 Q3 CHEMISTRY, PHYSICAL Colloid and Polymer Science Pub Date : 2024-02-20 DOI:10.1007/s00396-024-05240-3
Yansen Liu, Hang Zhao, Lei Yin, Jinbo Bai
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引用次数: 0

摘要

聚合物电介质具有易于加工和功率密度高的优点,被广泛应用于脉冲功率和电力电子设备中。然而,聚合物电介质的低储能密度(Ue)限制了其在现代电子工业中的应用。在这项工作中,我们提出了基于聚甲基丙烯酸甲酯(PMMA)基体和聚偏二氟乙烯(PVDF)纳米粒子的海岛结构多层复合材料,该复合材料是通过典型溶解度差异法的溶液混合和逐层溶液浇铸法构建而成。PVDF/PMMA 复合材料中含有大量 PVDF,作为非传统的中间极化层被置于夹层结构复合材料的中间。低 PVDF 含量的 PVDF/PMMA 复合材料被置于外层,以提高复合材料的绝缘性能。结果表明,内外PVDF体积含量分别为30%和10%的PVDF/PMMA复合材料获得了极好的介电常数值(εr ~ 4.35),比PMMA的介电常数值(εr ~ 3)高出45%。同时,在 422.48 MV m-1 的电场下,PVDF/PMMA 复合材料获得了最大 Ue(~ 4.95 J cm-3),比 PMMA(Ue ~ 1.61 J cm-3)高出 207%。储能能力的提高可归因于高极化粒子的引入、异质界面数量的增加以及复合材料的多层结构。这项工作为制备放电能量密度更高的先进全有机电介质提供了一种策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Enhanced energy storage property of all-organic dielectrics by gradient layered design of sea-island structures

Polymer dielectrics possessing the superiorities of easy processing and high power density are widely used in pulsed power and power electronics. However, the low energy storage density (Ue) of polymer dielectrics limits their application in the modern electronic industries. In this work, we present the sea-island structure multilayered composites based on polymethylmethacrylate (PMMA) matrix and polyvinylidene fluoride (PVDF) nanoparticles, which is constructed by the solution blending with typical solubility differences method and the layer-by-layer solution casting method. The PVDF/PMMA composite incorporated with high PVDF content is placed in the middle of the sandwich-structured composite as a non-traditional intermediate polarization layer. The PVDF/PMMA composite with low PVDF loading is placed in the outer layer to improve the insulating property of the composite. The results show that the PVDF/PMMA composites with inner and outer PVDF volume content of 30% and 10%, respectively, obtained an excellent dielectric constant value (εr ~ 4.35), which is 45% higher than that of PMMA (εr ~ 3). Meanwhile, the maximum Ue (~ 4.95 J cm−3) of the PVDF/PMMA composites at an electric field of 422.48 MV m−1 was obtained, which is 207% higher than that of PMMA (Ue ~ 1.61 J cm−3). The improved energy storage capability could be attributed to the introduction of highly polarizing particles, the increased number of heterogeneous interfaces, and the multilayered construction of composite. This work provides a strategy for the preparation of advanced all-organic dielectrics with a higher discharge energy density.

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来源期刊
Colloid and Polymer Science
Colloid and Polymer Science 化学-高分子科学
CiteScore
4.60
自引率
4.20%
发文量
111
审稿时长
2.2 months
期刊介绍: Colloid and Polymer Science - a leading international journal of longstanding tradition - is devoted to colloid and polymer science and its interdisciplinary interactions. As such, it responds to a demand which has lost none of its actuality as revealed in the trends of contemporary materials science.
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