Polymer nanocomposites with a “hilly-like” SiO2/Au interlayer towards excellent high-temperature energy storage performance

IF 13.3 1区 工程技术 Q1 ENGINEERING, CHEMICAL
Linwei Zhu , Jintao Tian , Zengliang Ren , Shuimiao Xia , Zelong Chang , Peng Yin , Davoud Dastan , Zhicheng Shi
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Abstract

Film capacitors based on polymer dielectrics are key components in pulsed power systems. But they always suffer from severe deterioration in energy storage performance at high temperatures because of accelerated carrier transfer and thermal runaway. Incorporating ceramic fillers into polymer is one of the most promising strategies to suppress the high-temperature carrier transfer. However, poor compatibility between ceramic and polymer always leads to agglomeration. Herein, SiO2 microspheres and Au nanoparticles are homogeneously embedded into the polymer films, forming a unique nanocomposite with a hilly-like SiO2/Au nanolayer. Benefiting from the wide bandgap of SiO2 microspheres and Coulomb-blockade effect of Au nanoparticles, the high-temperature charge transport is effectively suppressed. As a result, the poly(vinylidene fluoride-hexafluoropropylene) film embedded with a hilly-like SiO2/Au nanolayer exhibits significant enhancements of 252 %, 145 %, and 220 % at 50 ℃, 80 ℃, and 100 ℃ in energy density. It is further demonstrated that, the SiO2/Au nanolayer can also be employed to enhance the high-temperature energy performances of polyetherimide. The SiO2/Au/polyetherimide composite film achieves a high discharged energy density (6.16 J cm−3) for the η of 80 % at 600 MV m−1 and 150 ℃. This work offers an innovative and effective strategy to address the long-standing filler agglomeration challenge in organic/inorganic nanocomposites, which is not only of great significance for polymer based dielectric composites, but is also illuminating for the design of other nanocomposites.
具有“丘陵状”SiO2/Au中间层的聚合物纳米复合材料具有优异的高温储能性能
基于聚合物介质的薄膜电容器是脉冲电源系统的关键部件。但由于载流子转移加速和热失控,它们在高温下的储能性能会严重恶化。在聚合物中加入陶瓷填料是抑制高温载流子转移最有前途的方法之一。然而,陶瓷与聚合物的相容性较差,往往导致结块。本文将SiO2微球和Au纳米颗粒均匀嵌入到聚合物薄膜中,形成独特的具有丘陵状SiO2/Au纳米层的纳米复合材料。利用SiO2微球的宽带隙和Au纳米粒子的库仑封锁效应,有效抑制了高温电荷输运。结果表明,在50℃、80℃和100℃的温度下,包埋了丘陵状SiO2/Au纳米层的聚偏氟乙烯-六氟丙烯薄膜的能量密度分别提高了252 %、145 %和220 %。进一步证明,SiO2/Au纳米层还可以提高聚醚酰亚胺的高温能量性能。在600 MV m−1和150℃下,SiO2/Au/聚醚酰亚胺复合膜的放电能量密度为6.16 J cm−3,η值为80 %。本研究为解决有机/无机纳米复合材料中长期存在的填料团聚问题提供了一种创新和有效的策略,这不仅对聚合物基介电复合材料具有重要意义,而且对其他纳米复合材料的设计也具有启发意义。
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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来源期刊
Chemical Engineering Journal
Chemical Engineering Journal 工程技术-工程:化工
CiteScore
21.70
自引率
9.30%
发文量
6781
审稿时长
2.4 months
期刊介绍: The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.
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