通过 P(VDF-HFP)复合材料中的 PCBM 诱导电子陷阱,提高介电和储能性能。

IF 4.7 3区 工程技术 Q1 POLYMER SCIENCE Polymers Pub Date : 2024-10-29 DOI:10.3390/polym16213030
Yantao Yang, Jingqi Qiao, Haiyu Sun, Wenhao Yang, Liangliang Wei, Xuetong Zhao
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引用次数: 0

摘要

具有优异介电性能的聚合物基复合材料对于先进的储能应用至关重要。在这项研究中,[6,6]-苯基-C61-丁酸甲酯(PCBM)作为填料被加入到聚(偏氟乙烯-六氟丙烯)(P(VDF-HFP))复合材料中,以改善其介电性能。通过溶液浇铸法制备了不同 PCBM 浓度的聚偏二氟乙烯-六氟丙烯(P(VDF-HFP))复合薄膜,并对其介电、储能和充放电性能进行了表征。研究发现,掺杂 PCBM 可以引入能级为 1.25 eV 的新电荷阱,从而调节聚合物基体的电荷传输和储能特性。添加 0.2 vol% PCBM 后,复合材料的介电常数提高到最大值 10.87,击穿强度达到 455 MV/m,能量密度达到 7.38 J/cm3,比原始 P(VDF-HFP)薄膜高出 33%。此外,在 300 MV/m 的电场下,复合材料的充放电效率提高了 66%。这些结果表明,PCBM 显著改善了 P(VDF-HFP)复合材料的介电和储能性能,为柔性储能设备中高性能介电材料的开发提供了一种前景广阔的方法。
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Induced Electron Traps via the PCBM in P(VDF-HFP) Composites to Enhance Dielectric and Energy Storage Performance.

Polymer-based composites with excellent dielectric properties are essential for advanced energy storage applications. In this work, the [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as a filler was incorporated into the poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) composite to improve its dielectric performance. P(VDF-HFP) composite films with varying PCBM concentrations were prepared via solution casting and their dielectric, energy storage, and charge-discharge properties were characterized. It was found that the doped PCBM could introduce new charge traps with an energy level of 1.25 eV that modulate charge transport and energy storage characteristics of the polymer matrix. The dielectric constant of the composites was enhanced to the maximum of 10.87 as 0.2 vol% PCBM was added, while the breakdown strength reached 455 MV/m, achieving an energy density of 7.38 J/cm3, which is 33% higher than the pristine P(VDF-HFP) film. Furthermore, the charge-discharge efficiency of the composites was enhanced 66% under the electric field of 300 MV/m. These results demonstrate that PCBM significantly improves the dielectric and energy storage properties of P(VDF-HFP) composites, providing a promising approach for the development of high-performance dielectric materials in flexible energy storage devices.

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来源期刊
Polymers
Polymers POLYMER SCIENCE-
CiteScore
8.00
自引率
16.00%
发文量
4697
审稿时长
1.3 months
期刊介绍: Polymers (ISSN 2073-4360) is an international, open access journal of polymer science. It publishes research papers, short communications and review papers. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Polymers provides an interdisciplinary forum for publishing papers which advance the fields of (i) polymerization methods, (ii) theory, simulation, and modeling, (iii) understanding of new physical phenomena, (iv) advances in characterization techniques, and (v) harnessing of self-assembly and biological strategies for producing complex multifunctional structures.
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